SB2021101403 - Multiple vulnerabilities in AMD CPUs

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Main Vulnerability Database SB2021101403

SB2021101403 - Multiple vulnerabilities in AMD CPUs

Published: October 14, 2021

Security Bulletin ID SB2021101403
CSH Severity
Low
Patch available
NO
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Information disclosure (CVE-ID: CVE-2020-12965)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to CPUs transiently execute non-canonical loads using only the lower 48 address bits. A local attacker can gain unauthorized access to sensitive information on the system.


2) Information disclosure (CVE-ID: CVE-2021-26318)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local attacker to gain access to potentially sensitive information.

The vulnerability exists due to a timing and power-based side channel attack. A local attacker can leverage the x86 PREFETCH instructions and obtain kernel address space information.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References