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OpenCA libCheckSignature Signature Validation Vulnerability
Secunia Advisory: SA10664
Release Date: 2004-01-20
Popularity: 5,661 views

Critical:
Moderately critical
Impact: Security Bypass
Where: From remote
Solution Status: Vendor Patch

Software:OpenCA 0.x

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CVE reference:CVE-2004-0004


Description:
A vulnerability has been identified in OpenCA, which may result in an incorrect signature being accepted.

The vulnerability is caused due to a validation error in the "libCheckSignature()" function. The problem is that only the serial is compared between a certificate in the database and a signer's certificate when checking signatures.

All versions prior to 0.9.1.7 are vulnerable.

Solution:
Update to version 0.9.1.7.
http://www.openca.org/openca/download-releases.shtml

Provided and/or discovered by:
Reported by vendor.

Original Advisory:
OpenCA Security Advisory (2004-0004):
http://www.openca.org/news/CAN-2004-0004.txt

Other References:
CERT VU#336446:
http://www.kb.cert.org/vuls/id/336446


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