SB2020060701 - Security restrictions bypass in p5-Crypt-Perl
Published: June 7, 2020
Security Bulletin ID
SB2020060701
Severity
Medium
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-2020-13895)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper ECDSA signature verification for the secp256r1 (prime256v1) curve, when r and s are small and when s = 1. A remote attacker can bypass signature verification process for Crypt::Perl::ECDSA and trick the victim into installing malicious code.
Remediation
Install update from vendor's website.