CVE-2009-0127

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-01-15 · updated 2026-06-16
Weakness: CWE-287

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.

Affected products

Heikkitoivonen M2Crypto: all versions

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
https://bugzilla.redhat.com/show_bug.cgi?id=479676

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