Improper Verification of Cryptographic Signature in p5-Crypt-Perl - CVE-2020-13895
Published: June 7, 2020
Vulnerability identifier: #VU28771
CSH Severity: Medium
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-13895
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
p5-Crypt-Perl
How to mitigate CVE-2020-13895
Install updates from vendor's website.
p5-Crypt-Perl - update to 0.32