SB2021030823 - Advanced Virtualization for RHEL 8 update for the virt:8.2 and virt-devel:8.2 modules
Published: March 8, 2021
Security Bulletin ID
SB2021030823
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.
1) Security restrictions bypass (CVE-ID: CVE-2020-35517)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists within the virtio-fs shared file system daemon (virtiofsd). A remote privileged user of the guest operating system can create device special file in the shared directory and use it to r/w access host devices.
Remediation
Install update from vendor's website.