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    CVE-2008-4989

    The _gnutls_x509_verify_certificate function in lib/x509/verify.c in libgnutls in GnuTLS before 2.6.1 trusts certificate chains in which the last certificate is an arbitrary trusted, self-signed certificate, which allows man-in-the-middle attackers to insert a spoofed certificate for any Distinguished Name (DN).

    Published:Nov 10, 2008
    Last Modified:Apr 23, 2026
    EPS:Nov 13, 2008
    EPSS Score:0.00393
    CVSS Score:5.9

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Gnu
    Product
    Gnutls
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Suse
    Product
    Linux Enterprise
    Vendor
    Suse
    Product
    Linux Enterprise Server

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-295 Improper Certificate Validation

    Related CVEs

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    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    References

    http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3215
    http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3217
    http://lists.opensuse.org/opensuse-security-announce/2008-12/msg00002.html
    http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
    http://secunia.com/advisories/32619
    http://secunia.com/advisories/32681
    http://secunia.com/advisories/32687
    http://secunia.com/advisories/32879
    http://secunia.com/advisories/33501
    http://secunia.com/advisories/33694
    http://secunia.com/advisories/35423
    http://security.gentoo.org/glsa/glsa-200901-10.xml
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-260528-1
    http://wiki.rpath.com/Advisories:rPSA-2008-0322
    http://www.debian.org/security/2009/dsa-1719
    http://www.gnu.org/software/gnutls/security.html
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:227
    http://www.redhat.com/support/errata/RHSA-2008-0982.html
    http://www.securityfocus.com/archive/1/498431/100/0/threaded
    http://www.securityfocus.com/bid/32232
    http://www.securitytracker.com/id?1021167
    http://www.ubuntu.com/usn/usn-678-2
    http://www.vupen.com/english/advisories/2008/3086
    http://www.vupen.com/english/advisories/2009/1567
    https://exchange.xforce.ibmcloud.com/vulnerabilities/46482
    https://issues.rpath.com/browse/RPL-2886
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11650
    https://usn.ubuntu.com/678-1/
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00222.html
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00293.html
    http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3215
    http://article.gmane.org/gmane.comp.encryption.gpg.gnutls.devel/3217
    http://lists.opensuse.org/opensuse-security-announce/2008-12/msg00002.html
    http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00010.html
    http://secunia.com/advisories/32619
    http://secunia.com/advisories/32681
    http://secunia.com/advisories/32687
    http://secunia.com/advisories/32879
    http://secunia.com/advisories/33501
    http://secunia.com/advisories/33694
    http://secunia.com/advisories/35423
    http://security.gentoo.org/glsa/glsa-200901-10.xml
    http://sunsolve.sun.com/search/document.do?assetkey=1-26-260528-1
    http://wiki.rpath.com/Advisories:rPSA-2008-0322
    http://www.debian.org/security/2009/dsa-1719
    http://www.gnu.org/software/gnutls/security.html
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:227
    http://www.redhat.com/support/errata/RHSA-2008-0982.html
    http://www.securityfocus.com/archive/1/498431/100/0/threaded
    http://www.securityfocus.com/bid/32232
    http://www.securitytracker.com/id?1021167
    http://www.ubuntu.com/usn/usn-678-2
    http://www.vupen.com/english/advisories/2008/3086
    http://www.vupen.com/english/advisories/2009/1567
    https://exchange.xforce.ibmcloud.com/vulnerabilities/46482
    https://issues.rpath.com/browse/RPL-2886
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11650
    https://usn.ubuntu.com/678-1/
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00222.html
    https://www.redhat.com/archives/fedora-package-announce/2008-November/msg00293.html

    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