SB2021121359 - Signature verification bypass in CPAN
Published: December 13, 2021 Updated: October 24, 2022
Security Bulletin ID
SB2021121359
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2020-16156)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to incorrect processing of signed code. A remote attacker trick the victim into downloading a malicious file, bypass signature verification procedure and compromise the affected system.
Remediation
Install update from vendor's website.
References
- https://metacpan.org/pod/distribution/CPAN/scripts/cpan
- https://blog.hackeriet.no/cpan-signature-verification-vulnerabilities/
- http://blogs.perl.org/users/neilb/2021/11/addressing-cpan-vulnerabilities-related-to-checksums.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SZ32AJIV4RHJMLWLU5QULGKMMIHYOMDC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SD6RYOJII7HRJ6WVORFNVTYNOFY5JDXN/