[SECURITY] CVE-2012-3439 Apache Tomcat DIGEST authentication weaknesses

[Mark Thomas <ma...@apache.org>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

CVE-2012-3439 Apache Tomcat DIGEST authentication weaknesses

Severity: Moderate

Vendor: The Apache Software Foundation

Versions Affected:
- - Tomcat 7.0.0 to 7.0.29
- - Tomcat 6.0.0 to 6.0.35
- - Tomcat 5.5.0 to 5.5.35
- - Earlier, unsupported versions may also be affected

Description:
Three weaknesses in Tomcat's implementation of DIGEST authentication
were identified and resolved:
1. Tomcat tracked client rather than server nonces and nonce count.
2. When a session ID was present, authentication was bypassed.
3. The user name and password were not checked before when indicating
   that a nonce was stale.
These issues reduced the security of DIGEST authentication making
replay attacks possible in some circumstances.

Mitigation:
Users of affected versions should apply one of the following mitigations:
- - Tomcat 7.0.x users should upgrade to 7.0.30 or later
- - Tomcat 6.0.x users should upgrade to 6.0.36 or later
- - Tomcat 5.5.x users should upgrade to 5.5.36 or later

Credit:
The first issue was identified by Tilmann Kuhn. The second and third
issues were identified by the Tomcat security team during the code
review resulting from the first issue.

References:
http://tomcat.apache.org/security.html
http://tomcat.apache.org/security-7.html
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-5.html
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (MingW32)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/
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=ANZP
-----END PGP SIGNATURE-----