SB2023032170 - SUSE update for xen

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Main Vulnerability Database SB2023032170

SB2023032170 - SUSE update for xen

Published: March 21, 2023

Security Bulletin ID SB2023032170
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-42331)

CWE-ID: CWE-1037 - Processor optimization removal or modification of security-critical code

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


The vulnerability allows an attacker to escalate privileges on the system.

The vulnerability exists due to an oversight in the very original Spectre/Meltdown security work (XSA-254) caused by an unprotected RET instruction. An attacker with access to the guest OS can infer the contents of arbitrary host memory, including memory assigned to other guests.


2) Use-after-free (CVE-ID: CVE-2022-42332)

CWE-ID: CWE-416 - Use After Free

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


The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when guests are running in the shadow mode. An attacker with access to the guest OS can trigger a use-after-free error and escalate privileges on the system.


Remediation

Install update from vendor's website.

References