SB20230821154 - Fedora 38 update for xen

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20230821154

SB20230821154 - Fedora 38 update for xen

Published: August 21, 2023

Security Bulletin ID SB20230821154
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2023-20593)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in AMD Zen2 processors. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability was dubbed Zenbleed.


2) Deadlock (CVE-ID: CVE-2023-34320)

The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.

The vulnerability exists due to a coding error in code for Cortex-A77 cores (r0p0 and r1p0). A malicious guest can trigger a deadlock and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References