Stack-based buffer overflow in AMD EPYC Processors

1) Stack-based buffer overflow

EUVDB-ID: #VU97949

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2021-46746

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in ASP Secure OS Trusted Execution Environment (TEE). A local privileged user with access to AMD signing keys can trigger a stack-based buffer overflow and perform a denial of service (DoS) attack.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

The vendor is not planning to release a security patch to address this vulnerability.

Vulnerable software versions

1st Gen AMD EPYC Processors: All versions

2nd Gen AMD EPYC Processors: All versions

3rd Gen AMD EPYC Processors: All versions

4th Gen AMD EPYC Processors: All versions

CPE2.3

• cpe:2.3:h:amd:1st_gen_amd_epyc_processors:*:*:*:*:*:*:*:*...
• cpe:2.3:h:amd:2nd_gen_amd_epyc_processors:*:*:*:*:*:*:*:*...
• cpe:2.3:h:amd:3rd_gen_amd_epyc_processors:*:*:*:*:*:*:*:*...
• cpe:2.3:h:amd:4th_gen_amd_epyc_processors:*:*:*:*:*:*:*:*...

External links

http://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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