SB2024080547 - Fedora 40 update for xen

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Main Vulnerability Database SB2024080547

SB2024080547 - Fedora 40 update for xen

Published: August 5, 2024

Security Bulletin ID SB2024080547
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) Improper locking (CVE-ID: CVE-2024-31143)

CWE-ID: CWE-667 - Improper Locking

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


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

The vulnerability exists due to double unlock in x86 guest IRQ handling. An optional feature of PCI MSI called "Multiple Message" allows a device to use multiple consecutive interrupt vectors. A malicious guest can crash the hypervisor.


2) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2024-2201)

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

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


The vulnerability allows a malicious guest to escalate privileges on the system.

The vulnerability exists due to native branch history injection on x86 systems. A malicious guest can infer the contents of arbitrary host memory, including memory assigned to other guests and compromise the affected system.


Remediation

Install update from vendor's website.

References