Information disclosure in AMD CPUs

1) Information disclosure

EUVDB-ID: #VU79263

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-20569

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to a side channel issue in AMD CPUs. A remote user can influence the return address prediction and gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

3rd Gen AMD EPYC Processors: All versions

4th Gen AMD EPYC Processors: All versions

CPE2.3

• cpe:2.3:h:amd:3rd_gen_amd_epyc_processors:*:*:*:*:*:*:*:*
• cpe:2.3:h:amd:4th_gen_amd_epyc_processors:*:*:*:*:*:*:*:*

External links

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-7005
https://xenbits.xen.org/xsa/advisory-434.html
https://www.amd.com/en/resources/product-security/bulletin/amd-sb-7031.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.