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.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| M2crypto | Heikkitoivonen | - (including) | - (including) |
| M2crypto | Ubuntu | dapper | * |
| M2crypto | Ubuntu | devel | * |
| M2crypto | Ubuntu | gutsy | * |
| M2crypto | Ubuntu | hardy | * |
| M2crypto | Ubuntu | intrepid | * |
| M2crypto | Ubuntu | jaunty | * |
| M2crypto | Ubuntu | karmic | * |
| M2crypto | Ubuntu | upstream | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
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