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    CVE-2008-1949

    The _gnutls_recv_client_kx_message function in lib/gnutls_kx.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 continues to process Client Hello messages within a TLS message after one has already been processed, which allows remote attackers to cause a denial of service (NULL dereference and crash) via a TLS message containing multiple Client Hello messages, aka GNUTLS-SA-2008-1-2.

    Published:May 19, 2008
    Last Modified:Apr 23, 2026
    EPS:May 21, 2008
    EPSS Score:0.15166
    CVSS Score:9.3

    Affected Products

    Vendor
    Gnu
    Product
    Gnutls
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    http://www.cert.fi/haavoittuvuudet/advisory-gnutls.htmlhttp://www.cert.fi/haavoittuvuudet/advisory-gnutls.html

    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://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commitdiff%3Bh=bc8102405fda11ea00ca3b42acc4f4bce9d6e97b
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00051.html
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00055.html
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00060.html
    http://lists.opensuse.org/opensuse-security-announce/2008-09/msg00003.html
    http://secunia.com/advisories/30287
    http://secunia.com/advisories/30302
    http://secunia.com/advisories/30317
    http://secunia.com/advisories/30324
    http://secunia.com/advisories/30330
    http://secunia.com/advisories/30331
    http://secunia.com/advisories/30338
    http://secunia.com/advisories/30355
    http://secunia.com/advisories/31939
    http://security.gentoo.org/glsa/glsa-200805-20.xml
    http://securityreason.com/securityalert/3902
    http://sourceforge.net/project/shownotes.php?release_id=600646&group_id=21558
    http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0174
    http://www.cert.fi/haavoittuvuudet/advisory-gnutls.html
    http://www.debian.org/security/2008/dsa-1581
    http://www.kb.cert.org/vuls/id/252626
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:106
    http://www.openwall.com/lists/oss-security/2008/05/20/1
    http://www.openwall.com/lists/oss-security/2008/05/20/2
    http://www.openwall.com/lists/oss-security/2008/05/20/3
    http://www.redhat.com/support/errata/RHSA-2008-0489.html
    http://www.redhat.com/support/errata/RHSA-2008-0492.html
    http://www.securityfocus.com/archive/1/492282/100/0/threaded
    http://www.securityfocus.com/archive/1/492464/100/0/threaded
    http://www.securityfocus.com/bid/29292
    http://www.securitytracker.com/id?1020058
    http://www.ubuntu.com/usn/usn-613-1
    http://www.vupen.com/english/advisories/2008/1582/references
    http://www.vupen.com/english/advisories/2008/1583/references
    https://exchange.xforce.ibmcloud.com/vulnerabilities/42530
    https://issues.rpath.com/browse/RPL-2552
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9519
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00487.html
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00590.html
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00615.html
    http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commitdiff%3Bh=bc8102405fda11ea00ca3b42acc4f4bce9d6e97b
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00051.html
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00055.html
    http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00060.html
    http://lists.opensuse.org/opensuse-security-announce/2008-09/msg00003.html
    http://secunia.com/advisories/30287
    http://secunia.com/advisories/30302
    http://secunia.com/advisories/30317
    http://secunia.com/advisories/30324
    http://secunia.com/advisories/30330
    http://secunia.com/advisories/30331
    http://secunia.com/advisories/30338
    http://secunia.com/advisories/30355
    http://secunia.com/advisories/31939
    http://security.gentoo.org/glsa/glsa-200805-20.xml
    http://securityreason.com/securityalert/3902
    http://sourceforge.net/project/shownotes.php?release_id=600646&group_id=21558
    http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0174
    http://www.cert.fi/haavoittuvuudet/advisory-gnutls.html
    http://www.debian.org/security/2008/dsa-1581
    http://www.kb.cert.org/vuls/id/252626
    http://www.mandriva.com/security/advisories?name=MDVSA-2008:106
    http://www.openwall.com/lists/oss-security/2008/05/20/1
    http://www.openwall.com/lists/oss-security/2008/05/20/2
    http://www.openwall.com/lists/oss-security/2008/05/20/3
    http://www.redhat.com/support/errata/RHSA-2008-0489.html
    http://www.redhat.com/support/errata/RHSA-2008-0492.html
    http://www.securityfocus.com/archive/1/492282/100/0/threaded
    http://www.securityfocus.com/archive/1/492464/100/0/threaded
    http://www.securityfocus.com/bid/29292
    http://www.securitytracker.com/id?1020058
    http://www.ubuntu.com/usn/usn-613-1
    http://www.vupen.com/english/advisories/2008/1582/references
    http://www.vupen.com/english/advisories/2008/1583/references
    https://exchange.xforce.ibmcloud.com/vulnerabilities/42530
    https://issues.rpath.com/browse/RPL-2552
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9519
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00487.html
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00590.html
    https://www.redhat.com/archives/fedora-package-announce/2008-May/msg00615.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