Description
The libCheckSignature function in crypto-utils.lib for OpenCA 0.9.1.6 and earlier only compares the serial of the signer's certificate and the one in the database, which can cause OpenCA to incorrectly accept a signature if the certificate's chain is trusted by OpenCA's chain directory, allowing remote attackers to spoof requests from other users.
References
- 9435 vdb-entry
- openca-improper-signature-verification(14847) vdb-entry
- 3615 vdb-entry
- VU#336446 third-party-advisory
- http://www.openca.org/news/CAN-2004-0004.txt
- 20040116 [OpenCA Advisory] Vulnerability in signature verification mailing-list