Did Microsoft ever explain why Bitlocker could be deliberately circumvented?
Part of me thinks they are welcoming this drama because if the other 0-days are genuine bugs then it muddies the water and shifts the focus away from a the fact that they shipped an intentionally backdoored security product.
Attacking the messenger is an age-old trend in the bug reporting arena.
Microsoft has the backing of many governments, and has access to the best legal teams possible, leaving this guy in a world of hurt.
Microsoft seems to have brought this on themselves by creating a complex and user-hostile bug reporting system. It seems to me that they could have offered this person a job or a contract, because Eclipse has been amazingly effective at uncovering high-severity exploits.
Also, Eclipse could have approached various governments offering the exploits for sale, because a lucrative market exists for such things, assuming they aren't already in the NSA portfolio. Lots of above-board companies do the same thing.
Quotes in this article blame Eclipse for the damage, but the blame should really rest with Microsoft. Eclipse is apparently just one person using an AI framework. Microsoft has vastly more resources to discover and fix problems with their products, but they never seem to do it themselves.
I knew a guy who reported an Apple 0day and got similar treatment. I would expect it from those petty bitches. Guess times change.
> “CVD is a two-way street,” he said. “The vendor has some responsibility as well, so to go out publicly stating this person violated CVD without showing any of the correspondence seems bold.”
> “It confusingly claims their program ‘ensures researchers are compensated and publicly acknowledged’ in a statement answering a researcher who says he got neither,”
Well said.
I would argue that this form of disclosure is ethical in the face of Microsoft misbehaving. It's like mutually assured destruction - and in this case (it sounds like) Microsoft tried to cheat and thought they would get away with it.
Feeling consequences are how they are kept in line. Maybe next time they will think twice before (allegedly) treating a person like they did here, as well as the creative reasoning I recall them using in the past to reduce payouts.
TBH, the microsoft statement itself feels like slop. Not necessarily LLM slop (although who are we kidding, it probably was), but definitely like corporate slop, written by some manager with no context for how any of this is supposed to work (they laid off all the people who did), but with a need to make some sort of statement-shaped response
I know this is a crazy take. But I go feel so down trodden by many many tech corps these days I find it hard not to have a smidge of satisfaction for this guy pointing out the colossal favour research developers do for them by responsible disclosure.
That said, I feel bad for the inevitable victims of exploitation and also I am certain he will end up criminalized or as per usual the law will enforce a large corps will against him.
Yes. Definitely a Friday night after a hard week take.
Nothing crazy about it. Crazy is feeling sorry for the trillion dollar corporation. Don't let anyone tell you otherwise.
The right thing is immediate publication of all exploits, zero liability for the researcher who's just doing a public service and maximum liability for the corporation whose criminal negligence enabled the exploits to begin with.
Naw totally agree, we need way more robust protections for security researchers and way harsher penalties for corpos doing bullshit, it should be a percentage of revenue.
We have way too much fuck around these days and not nearly enough find out.
Microsoft chose to run a shoddy bounty program. The researcher tried to do the right thing.
Microsoft could have prevented this. They were warned. It's their own fault.
The exploit exists whether or not the researcher reports it. They didn't make the exploit.
Responding to bug bounty reports is a thankless job. Especially these days it's a flood of AI spam, language barriers, "pay me first", incomplete reports, huge egos, and people who think every find should be treated as a critical vulnerability. The people who handle these reports often do so after-hours or on holidays. In smaller companies they're also often the ones who manage the triage, patching, testing, and security release process. In larger companies they have to find owners for every line of code and convince those code owners of the severity (often knowing that neither or them will be rewarded for doing the work).
All it takes is one wrong person to be assigned as a report comes in, a person who doesn't understand the real value of a bounty program, or one person having a bad day to completely ruin a company's reputation. It seems like that might have happened here (of course MS has done this before so who knows if it'll matter in the end).
Microsoft needs to be completely transparent and to do so immediately. They should, with the reporters permission, release all communications. They can exclude technical details if patches aren't available yet. Doing anything less is going to prevent a lot of people from using their bounty program in the future and we'll all be worse off for it. They almost certainly made a mistake and they need to own up to it.
> The people who handle these reports often do so after-hours or on holidays.
If that's the case at Microsoft, something is absurdly wrong.
It is not all about money, but microsoft had a net income of 101 billion last year, and a 36% profit margin.
I am not saying humans or AI can create "perfect" software, but NASA has shown there is a HUGE gap between what can be achieved and what commercial software has generally done. We have given software a pass on the liability for the damage it can caused when it is defective for too long, that's the only way to change this, it must hit the bottom line.
Is NASA software accessible over the public internet?
Not all, but wouldn't that make a case for more rigorous standards? Economically things must be prioritized, but there is a very big gap between NASA standards and typical commercial software.
The best interests of the customers of Microsoft is an immediate apology, a payment of at least $100,000, and a signed agreement pledging that no (further) legal action will be taken.
The denial of Microsoft is just as harmful as the exploits of these flaws.
or everyone just dump all their exploits on Saturday morning 2AM, then buy puts.
You don't want to go short on a company when that happens, you want to go long.
Amazon stock goes up when AWS bugs take down the entire internet, because everyone realizes that more of the internet depends on Amazon than they thought.
> or everyone just dump all their exploits on Saturday morning 2AM, then buy puts.
But nobody can buy PUTs at 2am on a saturday morning? You should buy PUTs on a friday before close then dump the exploits no?
Short via Hyperliquid or some other crypto exchange that tokenizes stock? HL does have a trading pair for MSFT and trades 24/7.
[deleted]
It's poor form to publish exploits like this but Microsoft not paying their bounty is also poor form, and so is attempting to exploit the legal system to defend Microsoft's "right" to write buggy code.
I guess I'll play devil's advocate here, don't shoot me.
Over the course of my career I've had to deal with multiple hacks, DDOSes, and even situations working with the FBI. It's a mess, and extremely frustrating and unfair to those of us who are just trying to do a good job and make a living. Those of you who are throwing stones at Microsoft's coding, how confident are you that your code is safe from this new AI age?
Obviously MS handled this poorly, even after reading this article it's not clear how MS handles bug bounties. But that doesn’t mean this “researcher” deserves a pass.
Releasing 0-days, especially working exploit code for unpatched vulnerabilities, is extremely unethical. It has real potential to cause a lot of harm to regular engineers, and users who had nothing to do with the dispute.
I don't think it's their fault for not making code without exploits. I do think they should try and close them in a timely fashion when the exploit is pointed out though - the longer they wait the more chance bad actors find it in addition to the security researchers. Ultimately they need to cooperate here for users to be safe.
I wonder: what's the approximate market value on the bugs so far released?
there are active forks, and active mitigations for redsun undefend and bluehammer.
so far as i can tell yellowkey is problematic, as the exploit takes advantage of a backdoor that ms needs, to "manage" your computer.
> so far as i can tell yellowkey is problematic, as the exploit takes advantage of a backdoor that ms needs, to "manage" your computer.
It does look like an intentional backdoor. The way ms is responding to it is even more suspicious.
Pretty funny since this defeats security on most corporate laptops, so impact is huge. You'd expect them to treat the reporter better and fix the issue fast...
I'm curious why they put it in, I'm not sure I understand the 'to "manage" your computer' note.
Microsoft should have no reason to put something like this in. So either they were forced or they had some engineers that did this on their own without any oversight.
The backdoor could be a bug, but I don't really understand how it happened.
The attack works by having an NTFS log get replayed against another partition than the one the log is stored on.
Sending the right signals to unlock Bitlocker in TPM-only mode is a necessity for recovery operations. Managing to replace the executable launched post verification is a plausible attack vector.
The weird thing is why it's possible to put the corrupting transactions on a different disk than the one being updated.
In theory I think it would be possible that it's a combination of "all recovery partitions share the same FS identifier and are verified before transaction playback" (it is a pre-packaged WIM file after all) and "the transaction log stores the FS identifier of the partition the changes are meant for", but in my opinion the latter part is a very weird architecture to choose.
If this is a backdoor, I appreciate how clever they were hiding it. If this is a bug, the person who discovered it probably has a whole lot more ready to publish.
The thing that made Nightmare think it was a backdoor is that the bug is only present in the recovery version of the DLLs, not the one built into the system, and not prior versions of Windows. It’s also for a file system feature that Microsoft hasn’t “touched” in ages and they consider fairly esoteric.
manage- meaning remove or disable your stuff and reinstate slopware.
i dont know how much fiddling around you may have done to make a win11 install local and secure, but but if you dont get it right the first time, most often the next update will involve re-installation of bloatkrapp.
the in house usage is apparently to allow bypass of bitlocker by the winRE recovery environment.
this has been exploited for some time already, allowing malicious uses of trustedinstaller ACL.
ive had to deal with persistent installs using exactly this route, and a really nasty one will brick your machine if you dont knock out its components in proper sequence pwning the trusted installer account, and disabling the viral recovery mechanism.
did they start to do that at some point, or is this a pressure (blackmail?) campaign to get the to do that? I have no love for, but rather hate for, Microsoft, so I'm not suggesting blackmail in the sense of defending them, but it's something they could claim.
this is on Microsoft's website, they don't promise much for CVD
> “We remain firmly opposed to these actions, and any disclosure outside proper coordination that could harm our customers and the digital ecosystem,”
Precisely. /Your/ customers. I have no obligation to them and you profit handsomely from them. I'm not sure you can use "opposition" as a strategy to ameliorate your own negligence followed by inaction.
I read a little about BitLocker. It seems to store the encryption key in TPM and acquire it automatically after boot. I wonder, can encryption key be extracted by inserting a rogue PCIe card and reading it from memory, or by inserting a rogue DDR memory card with a backdoor to read the key from it, or by sniffing CPU - TPM bus?
[deleted]
yes sniffing is possible, for now im waiting for some pluton variant to start making its way into the chip and die stream.
the concept is to shield the TPM its bus, and any keys whith the CPU chip.
Sniffing the TPM's been available for quite some time, actually - and quite cheap!
The best way would be to arguably keep the key completely off the TPM and use remote attestation. There's some preboot products out there like WinMagic SecureDoc* that use a little Linux partition, spin up just enough to get a network connection up to a remote server, provide authentication services, and then send the Bitlocker key down, unlock the partition, and chainload onwards to Windows.
* I acquired an enterprise device on eBay and was VERY surprised to find this product on it as the preboot protector. Zero way to crack in from my end, so I applaud it. There's even some MFA solutions they offer around this! https://winmagic.com/en/solutions/mfa-windows-login/
Something I've never understood about TPM attestation, is what happens if you plug the TPM into a microcontroller and give it all the same measurements that it would normally receive during a normal boot? Would that let you spoof attestations?
Yes, you should be able to. In essence, the state of the TPM is represented in the values of the PCRs (Platform Configuration Registers). Those are hash-extended through the boot process.
You can create a key or similar attribute which has an unlock policy based on those PCR values. If you play back the log of PCR write events from first principles (the log can be captured for debug purposes), you'll put the TPM into the same state and should be able to use anything protected by the respective policy.
For attestation, I presume you're thinking about sending an attested PCR quote - in that case, the TPM uses a non-extractable key to sign the current PCR states. As you can put the PCRs into the "correct" state, you'd be able to get a signed attestation the system is in that state.
TPM-only saves you against someone pulling your drive. Probably more than enough for a USB drive. Enable startup PIN if you’re worried about someone grabbing the whole laptop.
I think it does not make much sense to protect the USB drive, as you won't be able to access it from another computer which is what USB drives are for. It makes sense to protect interval drives, but it is unlikely that someone would remove the drives and leave an expensive laptop to the owner.
I think of TPM-only more like a privacy lock than a deadbolt.
An encrypted external drive though works like a safe. Put things in there you want to keep safe but don’t need every day. Air gapped while not in use makes it even more safe.
[deleted]
I'm asking about TPM attestation in general, not Bitlocker
Yes.
Some modern CPUs have moved the TPM inside the CPU itself. But traditionally, TPMs were attached via the LPC (low pin-count) bus, and you could absolutely sniff them or de-solder them and arbitrarily MiTM.
[deleted]
Responsible disclosure isn't a law, it's a norm vendors invented and lean on when it suits them. Nothing legally requires you to report to a vendor first. Full disclosure and non disclosure are a valid choice as well.
Maybe Microsoft should spend less energy threatening researchers and more on not shipping the slop code in the first place.
Or maybe they shouldn't revoke the very accounts researchers are required to use to communicate exploits to MS?
Related:
GitHub bans security researcher who posted zero-day Windows exploits
At the end of the day, Microsoft won't care how bad any of this will make them look. Their reputation has been abysmal for decades, but none of it actually seems to have any kind of negative effect on their bottom line.
Because they mainly care about their reputation in C suites not internet forums.
Watching Microsoft squirm is always peak
I may not have seen the full story - and I am cognizant of this - but what I have seen so far puts me solidly on the side of Nightmare Eclipse.
Microsoft is making all indications that it is behaving like a colossal dick. It’s not a good look. As always: if you find yourself in a deep hole, stop digging.
Everything I've ready points to the same.
[dead]
I've been working with Microsoft products since about 1989. It has been mostly miserable, like living with a schizophrenic gorilla. You wake up in the morning and don't know how fucked your day is going to be. Dealing with them has been absolutely impossible even when you were one of their "gold" tier partners back in the day.
I hope the promise of a July 14th threat goes as planned. They need to hurt. And everyone needs to see the risks they are taking by using their products.
Sorry not sorry
This is poor damage control by Microslop. Why would the researcher publish valuable exploits without trying to get a bounty?
Usually, when an individual is that upset, the group or corporation is wrong and tries to shape public perception by lying.
Since when is publishing zero days a crime anyway? Shame on Microslop for these intimidation tactics. The real crime is vibe coding operating systems.
Hey MSRC. Maybe don't ban security researchers and then complain about vulnerabilities not being disclosed to you? Have you tried not fucking yoursef?
Did Microsoft ever explain why Bitlocker could be deliberately circumvented?
Part of me thinks they are welcoming this drama because if the other 0-days are genuine bugs then it muddies the water and shifts the focus away from a the fact that they shipped an intentionally backdoored security product.
Attacking the messenger is an age-old trend in the bug reporting arena.
Microsoft has the backing of many governments, and has access to the best legal teams possible, leaving this guy in a world of hurt.
Microsoft seems to have brought this on themselves by creating a complex and user-hostile bug reporting system. It seems to me that they could have offered this person a job or a contract, because Eclipse has been amazingly effective at uncovering high-severity exploits.
Also, Eclipse could have approached various governments offering the exploits for sale, because a lucrative market exists for such things, assuming they aren't already in the NSA portfolio. Lots of above-board companies do the same thing.
Quotes in this article blame Eclipse for the damage, but the blame should really rest with Microsoft. Eclipse is apparently just one person using an AI framework. Microsoft has vastly more resources to discover and fix problems with their products, but they never seem to do it themselves.
I knew a guy who reported an Apple 0day and got similar treatment. I would expect it from those petty bitches. Guess times change.
> “CVD is a two-way street,” he said. “The vendor has some responsibility as well, so to go out publicly stating this person violated CVD without showing any of the correspondence seems bold.”
> “It confusingly claims their program ‘ensures researchers are compensated and publicly acknowledged’ in a statement answering a researcher who says he got neither,”
Well said.
I would argue that this form of disclosure is ethical in the face of Microsoft misbehaving. It's like mutually assured destruction - and in this case (it sounds like) Microsoft tried to cheat and thought they would get away with it.
Feeling consequences are how they are kept in line. Maybe next time they will think twice before (allegedly) treating a person like they did here, as well as the creative reasoning I recall them using in the past to reduce payouts.
TBH, the microsoft statement itself feels like slop. Not necessarily LLM slop (although who are we kidding, it probably was), but definitely like corporate slop, written by some manager with no context for how any of this is supposed to work (they laid off all the people who did), but with a need to make some sort of statement-shaped response
I know this is a crazy take. But I go feel so down trodden by many many tech corps these days I find it hard not to have a smidge of satisfaction for this guy pointing out the colossal favour research developers do for them by responsible disclosure.
That said, I feel bad for the inevitable victims of exploitation and also I am certain he will end up criminalized or as per usual the law will enforce a large corps will against him.
Yes. Definitely a Friday night after a hard week take.
Nothing crazy about it. Crazy is feeling sorry for the trillion dollar corporation. Don't let anyone tell you otherwise.
The right thing is immediate publication of all exploits, zero liability for the researcher who's just doing a public service and maximum liability for the corporation whose criminal negligence enabled the exploits to begin with.
Naw totally agree, we need way more robust protections for security researchers and way harsher penalties for corpos doing bullshit, it should be a percentage of revenue.
We have way too much fuck around these days and not nearly enough find out.
Microsoft chose to run a shoddy bounty program. The researcher tried to do the right thing.
Microsoft could have prevented this. They were warned. It's their own fault.
The exploit exists whether or not the researcher reports it. They didn't make the exploit.
Responding to bug bounty reports is a thankless job. Especially these days it's a flood of AI spam, language barriers, "pay me first", incomplete reports, huge egos, and people who think every find should be treated as a critical vulnerability. The people who handle these reports often do so after-hours or on holidays. In smaller companies they're also often the ones who manage the triage, patching, testing, and security release process. In larger companies they have to find owners for every line of code and convince those code owners of the severity (often knowing that neither or them will be rewarded for doing the work).
All it takes is one wrong person to be assigned as a report comes in, a person who doesn't understand the real value of a bounty program, or one person having a bad day to completely ruin a company's reputation. It seems like that might have happened here (of course MS has done this before so who knows if it'll matter in the end).
Microsoft needs to be completely transparent and to do so immediately. They should, with the reporters permission, release all communications. They can exclude technical details if patches aren't available yet. Doing anything less is going to prevent a lot of people from using their bounty program in the future and we'll all be worse off for it. They almost certainly made a mistake and they need to own up to it.
> The people who handle these reports often do so after-hours or on holidays.
If that's the case at Microsoft, something is absurdly wrong.
It is not all about money, but microsoft had a net income of 101 billion last year, and a 36% profit margin.
I am not saying humans or AI can create "perfect" software, but NASA has shown there is a HUGE gap between what can be achieved and what commercial software has generally done. We have given software a pass on the liability for the damage it can caused when it is defective for too long, that's the only way to change this, it must hit the bottom line.
Is NASA software accessible over the public internet?
Not all, but wouldn't that make a case for more rigorous standards? Economically things must be prioritized, but there is a very big gap between NASA standards and typical commercial software.
The best interests of the customers of Microsoft is an immediate apology, a payment of at least $100,000, and a signed agreement pledging that no (further) legal action will be taken.
The denial of Microsoft is just as harmful as the exploits of these flaws.
or everyone just dump all their exploits on Saturday morning 2AM, then buy puts.
You don't want to go short on a company when that happens, you want to go long.
Amazon stock goes up when AWS bugs take down the entire internet, because everyone realizes that more of the internet depends on Amazon than they thought.
> or everyone just dump all their exploits on Saturday morning 2AM, then buy puts.
But nobody can buy PUTs at 2am on a saturday morning? You should buy PUTs on a friday before close then dump the exploits no?
Short via Hyperliquid or some other crypto exchange that tokenizes stock? HL does have a trading pair for MSFT and trades 24/7.
It's poor form to publish exploits like this but Microsoft not paying their bounty is also poor form, and so is attempting to exploit the legal system to defend Microsoft's "right" to write buggy code.
I guess I'll play devil's advocate here, don't shoot me.
Over the course of my career I've had to deal with multiple hacks, DDOSes, and even situations working with the FBI. It's a mess, and extremely frustrating and unfair to those of us who are just trying to do a good job and make a living. Those of you who are throwing stones at Microsoft's coding, how confident are you that your code is safe from this new AI age?
Obviously MS handled this poorly, even after reading this article it's not clear how MS handles bug bounties. But that doesn’t mean this “researcher” deserves a pass.
Releasing 0-days, especially working exploit code for unpatched vulnerabilities, is extremely unethical. It has real potential to cause a lot of harm to regular engineers, and users who had nothing to do with the dispute.
I don't think it's their fault for not making code without exploits. I do think they should try and close them in a timely fashion when the exploit is pointed out though - the longer they wait the more chance bad actors find it in addition to the security researchers. Ultimately they need to cooperate here for users to be safe.
I wonder: what's the approximate market value on the bugs so far released?
there are active forks, and active mitigations for redsun undefend and bluehammer.
so far as i can tell yellowkey is problematic, as the exploit takes advantage of a backdoor that ms needs, to "manage" your computer.
only recently has a OOB mitigation been offered
https://www.techspot.com/news/112410-security-researcher-mic...
> so far as i can tell yellowkey is problematic, as the exploit takes advantage of a backdoor that ms needs, to "manage" your computer.
It does look like an intentional backdoor. The way ms is responding to it is even more suspicious.
Pretty funny since this defeats security on most corporate laptops, so impact is huge. You'd expect them to treat the reporter better and fix the issue fast...
I'm curious why they put it in, I'm not sure I understand the 'to "manage" your computer' note.
Microsoft should have no reason to put something like this in. So either they were forced or they had some engineers that did this on their own without any oversight.
The backdoor could be a bug, but I don't really understand how it happened.
The attack works by having an NTFS log get replayed against another partition than the one the log is stored on.
Sending the right signals to unlock Bitlocker in TPM-only mode is a necessity for recovery operations. Managing to replace the executable launched post verification is a plausible attack vector.
The weird thing is why it's possible to put the corrupting transactions on a different disk than the one being updated.
In theory I think it would be possible that it's a combination of "all recovery partitions share the same FS identifier and are verified before transaction playback" (it is a pre-packaged WIM file after all) and "the transaction log stores the FS identifier of the partition the changes are meant for", but in my opinion the latter part is a very weird architecture to choose.
If this is a backdoor, I appreciate how clever they were hiding it. If this is a bug, the person who discovered it probably has a whole lot more ready to publish.
The thing that made Nightmare think it was a backdoor is that the bug is only present in the recovery version of the DLLs, not the one built into the system, and not prior versions of Windows. It’s also for a file system feature that Microsoft hasn’t “touched” in ages and they consider fairly esoteric.
manage- meaning remove or disable your stuff and reinstate slopware.
i dont know how much fiddling around you may have done to make a win11 install local and secure, but but if you dont get it right the first time, most often the next update will involve re-installation of bloatkrapp.
the in house usage is apparently to allow bypass of bitlocker by the winRE recovery environment.
this has been exploited for some time already, allowing malicious uses of trustedinstaller ACL.
ive had to deal with persistent installs using exactly this route, and a really nasty one will brick your machine if you dont knock out its components in proper sequence pwning the trusted installer account, and disabling the viral recovery mechanism.
> backdoor that ms needs
source:
this is from 2010 but says that microsoft was not going to pay bug bounties https://www.computerworld.com/article/1510124/microsoft-no-m...
did they start to do that at some point, or is this a pressure (blackmail?) campaign to get the to do that? I have no love for, but rather hate for, Microsoft, so I'm not suggesting blackmail in the sense of defending them, but it's something they could claim.
this is on Microsoft's website, they don't promise much for CVD
https://www.microsoft.com/en-us/msrc/cvd
> “We remain firmly opposed to these actions, and any disclosure outside proper coordination that could harm our customers and the digital ecosystem,”
Precisely. /Your/ customers. I have no obligation to them and you profit handsomely from them. I'm not sure you can use "opposition" as a strategy to ameliorate your own negligence followed by inaction.
I read a little about BitLocker. It seems to store the encryption key in TPM and acquire it automatically after boot. I wonder, can encryption key be extracted by inserting a rogue PCIe card and reading it from memory, or by inserting a rogue DDR memory card with a backdoor to read the key from it, or by sniffing CPU - TPM bus?
yes sniffing is possible, for now im waiting for some pluton variant to start making its way into the chip and die stream.
the concept is to shield the TPM its bus, and any keys whith the CPU chip.
Sniffing the TPM's been available for quite some time, actually - and quite cheap!
https://pulsesecurity.co.nz/articles/TPM-sniffing
The best way would be to arguably keep the key completely off the TPM and use remote attestation. There's some preboot products out there like WinMagic SecureDoc* that use a little Linux partition, spin up just enough to get a network connection up to a remote server, provide authentication services, and then send the Bitlocker key down, unlock the partition, and chainload onwards to Windows.
* I acquired an enterprise device on eBay and was VERY surprised to find this product on it as the preboot protector. Zero way to crack in from my end, so I applaud it. There's even some MFA solutions they offer around this! https://winmagic.com/en/solutions/mfa-windows-login/
Something I've never understood about TPM attestation, is what happens if you plug the TPM into a microcontroller and give it all the same measurements that it would normally receive during a normal boot? Would that let you spoof attestations?
Yes, you should be able to. In essence, the state of the TPM is represented in the values of the PCRs (Platform Configuration Registers). Those are hash-extended through the boot process.
You can create a key or similar attribute which has an unlock policy based on those PCR values. If you play back the log of PCR write events from first principles (the log can be captured for debug purposes), you'll put the TPM into the same state and should be able to use anything protected by the respective policy.
For attestation, I presume you're thinking about sending an attested PCR quote - in that case, the TPM uses a non-extractable key to sign the current PCR states. As you can put the PCRs into the "correct" state, you'd be able to get a signed attestation the system is in that state.
TPM-only saves you against someone pulling your drive. Probably more than enough for a USB drive. Enable startup PIN if you’re worried about someone grabbing the whole laptop.
I think it does not make much sense to protect the USB drive, as you won't be able to access it from another computer which is what USB drives are for. It makes sense to protect interval drives, but it is unlikely that someone would remove the drives and leave an expensive laptop to the owner.
I think of TPM-only more like a privacy lock than a deadbolt.
An encrypted external drive though works like a safe. Put things in there you want to keep safe but don’t need every day. Air gapped while not in use makes it even more safe.
I'm asking about TPM attestation in general, not Bitlocker
Yes.
Some modern CPUs have moved the TPM inside the CPU itself. But traditionally, TPMs were attached via the LPC (low pin-count) bus, and you could absolutely sniff them or de-solder them and arbitrarily MiTM.
Responsible disclosure isn't a law, it's a norm vendors invented and lean on when it suits them. Nothing legally requires you to report to a vendor first. Full disclosure and non disclosure are a valid choice as well.
Maybe Microsoft should spend less energy threatening researchers and more on not shipping the slop code in the first place.
Or maybe they shouldn't revoke the very accounts researchers are required to use to communicate exploits to MS?
Related:
GitHub bans security researcher who posted zero-day Windows exploits
https://news.ycombinator.com/item?id=48315968
At the end of the day, Microsoft won't care how bad any of this will make them look. Their reputation has been abysmal for decades, but none of it actually seems to have any kind of negative effect on their bottom line.
Because they mainly care about their reputation in C suites not internet forums.
Watching Microsoft squirm is always peak
I may not have seen the full story - and I am cognizant of this - but what I have seen so far puts me solidly on the side of Nightmare Eclipse.
Microsoft is making all indications that it is behaving like a colossal dick. It’s not a good look. As always: if you find yourself in a deep hole, stop digging.
Everything I've ready points to the same.
[dead]
I've been working with Microsoft products since about 1989. It has been mostly miserable, like living with a schizophrenic gorilla. You wake up in the morning and don't know how fucked your day is going to be. Dealing with them has been absolutely impossible even when you were one of their "gold" tier partners back in the day.
I hope the promise of a July 14th threat goes as planned. They need to hurt. And everyone needs to see the risks they are taking by using their products.
Sorry not sorry
This is poor damage control by Microslop. Why would the researcher publish valuable exploits without trying to get a bounty?
Usually, when an individual is that upset, the group or corporation is wrong and tries to shape public perception by lying.
Since when is publishing zero days a crime anyway? Shame on Microslop for these intimidation tactics. The real crime is vibe coding operating systems.
Hey MSRC. Maybe don't ban security researchers and then complain about vulnerabilities not being disclosed to you? Have you tried not fucking yoursef?