SB2020112438 - Privilege escalation in Xen
Published: November 24, 2020
Security Bulletin ID
SB2020112438
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
CWE-ID: CWE-193 - Off-by-one Error
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to an off-by-one error. A local user on the HVM or PVH system can run a specially crafted program on the guest OS, trigger an off-by-one error and execute arbitrary code on the hypervisor.
Note, the vulnerability exists due to incorrect patch of vulnerability #VU48638.
Remediation
Install update from vendor's website.