CVE-2009-0127: Heikkitoivonen m2crypto

Medium severity, CVSS 5.0. EPSS: 1.4% chance of exploitation in the next 30 days.

M2Crypto does not properly check the return value from the OpenSSL EVP_VerifyFinal, DSA_verify, ECDSA_verify, DSA_do_verify, and ECDSA_do_verify functions, which might allow remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077. NOTE: a Linux vendor disputes the relevance of this report to the M2Crypto product because "these functions are not used anywhere in m2crypto.

Affected products

Published 2009-01-15. Last modified 2026-06-16.