#VU28771 Improper Verification of Cryptographic Signature in p5-Crypt-Perl - CVE-2020-13895
Published: June 7, 2020
Vulnerability identifier: #VU28771
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2020-13895
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
p5-Crypt-Perl
p5-Crypt-Perl
Software vendor:
Felipe Gasper
Felipe Gasper
Description
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 updates from vendor's website.