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    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.

    Published:Sep 8, 2006
    Last Modified:Apr 16, 2026
    EPS:Sep 14, 2006
    EPSS Score:0.06792
    CVSS Score:5

    Affected Products

    Vendor
    Gnu
    Product
    Gnutls
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-42014 (CVSS 6.6) — A flaw was found in GnuTLS. The `gnutls_pkcs11_token_set_pin` function, used for changing the Security Officer…
    CVE-2026-5419 (CVSS 3.7) — A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This…
    CVE-2026-42013 (CVSS 8.2) — A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could ca…
    CVE-2026-42012 (CVSS 7.1) — A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially craft…
    CVE-2026-5260 (CVSS 8.2) — A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA…
    CVE-2026-33846 (CVSS 7.5) — A heap buffer overflow vulnerability exists in the DTLS handshake fragment reassembly logic of GnuTLS. The iss…
    CVE-2026-3832 (CVSS 3.7) — A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially craft…
    CVE-2026-33845 (CVSS 7.5) — A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leadi…
    CVE-2026-3833 (CVSS 6.5) — A flaw was found in gnutls. This vulnerability occurs because gnutls performs case-sensitive comparisons of `n…
    CVE-2026-42009 (CVSS 7.5) — A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security …

    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
    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
    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
    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
    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
    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

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High