National Cyber-Alert System

Vulnerability Summary for CVE-2009-0127

Overview

** DISPUTED ** 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."

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

Vendor Statments (disclaimer)

Official Statement from Red Hat (01/21/2009)

Red Hat does not consider this to be a security issue. M2Crypto provides python interfaces to multiple OpenSSL functions. Neither of those interfaces is further used by M2Crypto in an insecure way. Additionally, no application shipped in Red Hat Enterprise Linux is known to use affected interfaces provided by M2Crypto. Further details can be found in the following bug report: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2009-0127#c1

References to Advisories, Solutions, and Tools

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Vulnerable software and versions

Configuration 1

OR

* cpe:/a:heikkitoivonen:m2crypto:_nil_

* Denotes Vulnerable Software

* Changes related to vulnerability configurations