CPANSA-Crypt-Perl-2020-02: Crypt-Perl vulnerability

Publisher giterlizzi Document category csaf_security_advisory
Initial release date 2020-06-07T00:00:00 Engine CSAF Perl Toolkit 0.25
Current release date 2020-06-07T00:00:00 Build Date
Current version 1 Status final
CVSS v3.1 Base Score 8.8 Severity High
Original language Language en
Also referred to

Vulnerability Description

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.

Vulnerabilities

CVE-2020-13895

Vulnerability Description

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.

Weakness CWE-347 : Improper Verification of Cryptographic Signature

Product status

Known affected
Product Score
Crypt-Perl less than 0.32
CVSS Version CVSS Vector CVSS Base Score CVSS Base Severity
3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H 8.8 High
2.0 AV:N/AC:M/Au:N/C:P/I:P/A:P 6.8 Medium
Fixed

giterlizzi

Namespace: https://github.com/giterlizzi/

gdt@cpan.org

References

Revision history

Version Date of the revision Summary of the revision
1 Sun Jun 7 00:00:00 2020 First release

Sharing rules

TLP:WHITE
For the TLP version see: https://www.first.org/tlp/