SB2023111513 - BTC/SRSO protections bypass in Xen
Published: November 15, 2023
Security Bulletin ID
SB2023111513
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security features bypass (CVE-ID: CVE-2023-46836)
CWE-ID: CWE-254 - Security Features
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote guest to bypass implemented security restrictions.
The vulnerability exists due to improper implementation of mitigations against BTC/SRSO. A malicious guest can bypass BTC/SRSO protections and launch a BTC/SRSO attack against Xen, which can result in memory access to other guests.
Remediation
Install update from vendor's website.