CVE-2020-13895: p5-Crypt-Perl Project p5-Crypt-Perl

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Crypt::Perl::ECDSA in the Crypt::Perl (aka p5-Crypt-Perl) module before 0.32 for Perl fails to verify correct ECDSA signatures when r and s are small and when s = 1. This happens when using the curve secp256r1 (prime256v1). This could conceivably have a security-relevant impact if an attacker wishes to use public r and s values when guessing whether signature verification will fail.

Affected products

• p5-Crypt-Perl Project p5-Crypt-Perl: before 0.32 (fixed in 0.32)

Published 2020-06-07. Last modified 2026-06-17.