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ISC BIND "EVP_VerifyFinal()" and "DSA_do_verify()" Spoofing Vulnerability

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Release Date:  2009-01-08    Last Update:  2009-01-28    Views:  9,569

Secunia Advisory SA33404

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A vulnerability has been reported in ISC BIND, which potentially can be exploited by malicious people to conduct spoofing attacks.

The vulnerability is caused due to certain ISC BIND functions not correctly verifying the return value of the OpenSSL "EVP_VerifyFinal()" and "DSA_do_verify()" functions when validating the signature of DSA and NSEC3DSA keys. This may be exploited to e.g. send spoofed responses from zones using DSA or NSEC3DSA keys.

Successful exploitation requires that the zone uses the DSA or NSEC3DSA algorithms.

The vulnerability is reported in the following versions:
* BIND 9.0 (all versions)
* BIND 9.1 (all versions)
* BIND 9.2 (all versions)
* BIND 9.3.0, 9.3.1, 9.3.2, 9.3.3, 9.3.4, 9.3.5, 9.3.6
* BIND 9.4.0, 9.4.1, 9.4.2, 9.4.3
* BIND 9.5.0, 9.5.1
* BIND 9.6.0

This is related to:
SA33338


Solution:
Update to version 9.3.6-P1, 9.4.3-P1, 9.5.1-P1, or 9.6.0-P1.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Originally reported in OpenSSL by the Google Security Team.

Reported in BIND by Florian Weimer.

Original Advisory:
ISC:
https://www.isc.org/node/373

oCERT:
http://www.ocert.org/advisories/ocert-2008-016.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: ISC BIND "EVP_VerifyFinal()" and "DSA_do_verify()" Spoofing Vulnerabil

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