SB2021081205 - Privilege escalation via Encode.pm from p5-encode package in Perl
Published: August 12, 2021 Updated: December 21, 2022
Security Bulletin ID
SB2021081205
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) Insecure library loading (CVE-ID: CVE-2021-36770)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a logic error in the Encode.pm script. A local user can place a malicious library into the current working directory and escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://security-tracker.debian.org/tracker/CVE-2021-36770
- https://github.com/Perl/perl5/commit/c1a937fef07c061600a0078f4cb53fe9c2136bb9
- https://news.cpanel.com/unscheduled-tsr-10-august-2021/
- https://metacpan.org/dist/Encode/changes
- https://github.com/dankogai/p5-encode/commit/527e482dc70b035d0df4f8c77a00d81f8d775c74