{"cve":"CVE-2009-0127","nvd":{"published":"2009-01-15T17:30:00.577","modified":"2026-06-16T23:04:18.620","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-287"],"references":["http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511515","http://openwall.com/lists/oss-security/2009/01/12/4","https://bugzilla.redhat.com/show_bug.cgi?id=479676","http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511515","http://openwall.com/lists/oss-security/2009/01/12/4"],"products":["heikkitoivonen:m2crypto"],"source":"nvd","synced_at":"2026-10-19T19:53:23.791937413+00:00"},"epss":{"cve":"CVE-2009-0127","score":0.01379,"percentile":0.7211,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}