Back
CVE-2004-0004
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…
High7.5EPSS 2.1%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 2.1% · top 18% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (6)
- 9435 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- openca-improper-signature-verification(14847) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- 3615 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- VU#336446 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- http://www.openca.org/news/CAN-2004-0004.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- 20040116 [OpenCA Advisory] Vulnerability in signature verification (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .