CVE Feed

    Dashboard / CVE / CVE-2009-2730

    CVE-2009-2730

    libgnutls in GnuTLS before 2.8.2 does not properly handle a '\0' character in a domain name in the subject's (1) Common Name (CN) or (2) Subject Alternative Name (SAN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority.

    Published:Aug 4, 2009
    Last Modified:Apr 23, 2026
    EPS:Aug 12, 2009
    EPSS Score:0.02695
    CVSS Score:7.5

    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://article.gmane.org/gmane.network.gnutls.general/1733
    http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
    http://secunia.com/advisories/36266
    http://secunia.com/advisories/36496
    http://www.openwall.com/lists/oss-security/2009/08/14/6
    http://www.redhat.com/support/errata/RHSA-2009-1232.html
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.securitytracker.com/id?1022777
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    https://exchange.xforce.ibmcloud.com/vulnerabilities/52404
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10778
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8409
    https://rhn.redhat.com/errata/RHSA-2010-0095.html
    http://article.gmane.org/gmane.network.gnutls.general/1733
    http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.html
    http://secunia.com/advisories/36266
    http://secunia.com/advisories/36496
    http://www.openwall.com/lists/oss-security/2009/08/14/6
    http://www.redhat.com/support/errata/RHSA-2009-1232.html
    http://www.securityfocus.com/archive/1/507985/100/0/threaded
    http://www.securitytracker.com/id?1022777
    http://www.vmware.com/security/advisories/VMSA-2009-0016.html
    https://exchange.xforce.ibmcloud.com/vulnerabilities/52404
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10778
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8409
    https://rhn.redhat.com/errata/RHSA-2010-0095.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