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Guru3D.com » News » AMD fixed a vulnerability in its chipset drivers that let non-administrators get passwords

AMD fixed a vulnerability in its chipset drivers that let non-administrators get passwords

by Hilbert Hagedoorn on: 09/21/2021 03:42 PM | source: | 7 comment(s)
AMD fixed a vulnerability in its chipset drivers that let non-administrators get passwords

First off, the vulnerability was fixed in AMD's newest PSP and chipset drivers (download here), which AMD recommends updating. Kyriakos Economou, a security researcher and co-founder of ZeroPeril, uncovered the flaw and promptly contacted AMD, working closely with the red team to patch it.

This vulnerability allows obtaining information of all kinds, including credentials of users with administrative privileges to escalate privileges or hashes that allow network access, and even exceeding mitigations of different vulnerabilities to later exploit them. Economou said this regarding the new vulnerability:

During our tests we were able to filter out multiple gigabytes of uninitialized physical pages when reserving and continuously release blocks of 100 reservations until the system fails to return a buffer of contiguous physical pages.

The content on these physical pages ranged from kernel objects to arbitrary pool addresses that served to bypass mitigations for vulnerabilities such as KASLR, and they even had registry key mappings of \ Registry \ Machine \ SAM containing NTLM hashes of authentication credentials. that could be used in subsequent attacks.

For example, this technique can be used to steal credentials from a user with administrative privileges or used in the "pass-the-hash" style to gain access within a network.

The PSP (Platform Security Processor) drivers should be updated to version 5.17.0.0 via Windows Update, and the chipset drivers should be updated to version 3.08.17.735 or newer, which already includes the PSP update that resolves this vulnerability. No BIOS updates are required.







« Intel 6th patent infringement case, China may restrict the sale of its CPUs. · AMD fixed a vulnerability in its chipset drivers that let non-administrators get passwords · Corsair Announces the Release of the M65 RGB ULTRA Gaming Mice »

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zhalonia
Member



Posts: 99
Joined: 2014-06-11

#5948337 Posted on: 09/21/2021 04:10 PM
can't wait for the next update cause this aint working.

TieSKey
Senior Member



Posts: 222
Joined: 2015-09-26

#5948418 Posted on: 09/21/2021 07:38 PM
Good thing I have PSP disabled in the first place....

waltc3
Senior Member



Posts: 1443
Joined: 2014-07-22

#5948424 Posted on: 09/21/2021 07:59 PM
No problem, here. Seems like we've heard multiple reports about AMD patching the same bug... ;) It was patched a while ago--old news.

KissSh0t
Senior Member



Posts: 12597
Joined: 2011-10-22

#5948496 Posted on: 09/22/2021 12:43 AM
The update to the PSP driver was already pushed to systems via Windows Update... before the chipset driver "package" was released if memory serves.

*edit*

checked mine, Haven't installed the new chipset driver and already have 5.17.0.0



hamltnblue
Senior Member



Posts: 138
Joined: 2006-02-03

#5948594 Posted on: 09/22/2021 11:56 AM
Interesting driver date. Instead of getting it early, you machine simply moved into the future.

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