Vulnerability in P5-Crypt-Perl Project
CVE-2020-13895
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.
EPSS: 0.007 (49.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- P5-crypt-perl_project P5-crypt-perl
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
- cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2020-13895?
- CVE-2020-13895 is a high-severity vulnerability in P5-Crypt-Perl Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.8/10. Published 2020-06-07.
- How severe is CVE-2020-13895?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2020-13895 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.