SB2023092035 - Privilege escalation in Xen shadow mode implementation
Published: September 20, 2023
Security Bulletin ID
SB2023092035
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2023-34322)
The vulnerability allows a malicious guest to escalate privileges on the system.
The vulnerability exists due to improper management of internal resources when running PV guests in shadow paging mode. A malicious guest can run a specially crafted application on the system that causes shortage of memory in the associated with the domain shadow pool and forces Xen to tear down page tables. This can result in memory leak, denial of service or privilege escalation.
The vulnerability can be exploited by 64-bit PV guests on x86 systems.
Remediation
Install update from vendor's website.