CVE-2006-4790
verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3, does not properly handle excess data in the digestAlgorithm.parameters field when generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents GnuTLS from correctly verifying X.509 and other certificates that use PKCS, a variant of CVE-2006-4339.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:P/A:N- EPSS score
- 2.6% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-4777)
- Published
- September 14, 2006
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-4777 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
- gnu / gnutls
References
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001205.html
- http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001212.html
- http://secunia.com/advisories/21937
- http://secunia.com/advisories/21942
- http://secunia.com/advisories/21973
- http://secunia.com/advisories/22049
- http://secunia.com/advisories/22080
- http://secunia.com/advisories/22084
- http://secunia.com/advisories/22097
- http://secunia.com/advisories/22226
- http://secunia.com/advisories/22992
- http://secunia.com/advisories/25762
- http://security.gentoo.org/glsa/glsa-200609-15.xml
- http://securitytracker.com/id?1016844
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-102648-1
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-102970-1
- http://support.avaya.com/elmodocs2/security/ASA-2006-250.htm
- http://www.debian.org/security/2006/dsa-1182
- http://www.gnu.org/software/gnutls/security.html(Patch)
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:166
- http://www.novell.com/linux/security/advisories/2006_23_sr.html
- http://www.novell.com/linux/security/advisories/2007_10_ibmjava.html
- http://www.redhat.com/support/errata/RHSA-2006-0680.html(Patch, Vendor Advisory)
- http://www.securityfocus.com/bid/20027
- http://www.ubuntu.com/usn/usn-348-1
- http://www.vupen.com/english/advisories/2006/3635
- http://www.vupen.com/english/advisories/2006/3899
- http://www.vupen.com/english/advisories/2007/2289
- https://exchange.xforce.ibmcloud.com/vulnerabilities/28953
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9937
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain