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Vulnerability record · CVE-2008-1949 · published 21 May 2008

CVE-2008-1949: Gnutls improper authentication vulnerability

Gnu · Gnutls

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.

9.3 CVSS 2.0 High EPSS 5.8% · top 7.2% CWE-287 · Improper authentication
9.3CVSS 2.0 base score
5.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
80References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Vendor Advisory
http://secunia.com/advisories/30302 Vendor Advisory
http://secunia.com/advisories/30317 Vendor Advisory
http://secunia.com/advisories/30324 Vendor Advisory
http://secunia.com/advisories/30330 Vendor Advisory
http://secunia.com/advisories/30331 Vendor Advisory
http://secunia.com/advisories/30338 Vendor Advisory
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 Exploit
http://www.debian.org/security/2008/dsa-1581
http://www.kb.cert.org/vuls/id/252626 US Government Resource
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 Patch
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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2008-1949), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.