SB2021011287 - Privilege escalation in ClusterLabs crmsh
Published: January 12, 2021 Updated: March 15, 2021
Security Bulletin ID
SB2021011287
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Privilege Management (CVE-ID: CVE-2020-35459)
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper privilege management. A local user can call "crm history" (when "crm" is run) and execute commands via shell code injection to the crm history commandline, potentially allowing escalation of privileges.
Remediation
Install update from vendor's website.
References
- http://www.openwall.com/lists/oss-security/2021/01/12/3
- https://bugzilla.suse.com/show_bug.cgi?id=1179999
- https://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476
- https://github.com/ClusterLabs/crmsh/releases
- https://lists.debian.org/debian-lts-announce/2021/01/msg00021.html
- https://www.openwall.com/lists/oss-security/2021/01/12/3