CVE-2009-0127
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N- Weakness (CWE)
- CWE-287
- EPSS score
- 1.4% (72th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-0136)
- Published
- January 15, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-0136 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.
View on the EU Vulnerability DatabaseAffected products
- heikkitoivonen / m2crypto
References
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511515(Third Party Advisory)
- http://openwall.com/lists/oss-security/2009/01/12/4(Mailing List)
- https://bugzilla.redhat.com/show_bug.cgi?id=479676(Exploit, Issue Tracking)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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