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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 4.0 | gnutls13 | 1.4.4-3+etch1 | DSA-1581-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 5 | gnutls +2 | 1.4.1-3.el5_1 | RHSA-2008:0489 |
| RHEL 4 | gnutls +1 | 1.0.20-4.el4_6 | RHSA-2008:0492 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | gnutls | 3.7.2-1.2 | openSUSE-SU-2024:10801-1 |
Advisories 4
- RHSA-2008:0489 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2008:0492 Red Hat Security Advisory: gnutls security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-1581-1 gnutls13 - potential code execution Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10801-1 gnutls-3.7.2-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 30331 third-party-advisory
- oval:org.mitre.oval:def:9519 vdb-entry signature
- 31939 third-party-advisory
- USN-613-1 vendor-advisory
- SUSE-SA:2008:046 vendor-advisory
- RHSA-2008:0492 vendor-advisory
- [oss-security] 20080520 Re: CVE ID request: GNUTLS mailing-list
- GLSA-200805-20 vendor-advisory
- 30355 third-party-advisory
- 30317 third-party-advisory
- 20080520 Vulnerability Advisory on GnuTLS mailing-list
- RHSA-2008:0489 vendor-advisory
- 20080522 rPSA-2008-0174-1 gnutls mailing-list
- [gnutls-devel] 20080519 GnuTLS 2.2.4 - Security release [GNUTLS-SA-2008-1] mailing-list
- http://sourceforge.net/project/shownotes.php?release_id=600646&group_id=21558
- 30324 third-party-advisory
- 30302 third-party-advisory
- [gnutls-devel] 20080519 Re: GnuTLS 2.2.4 - Security release [GNUTLS-SA-2008-1] mailing-list
- ADV-2008-1583 vdb-entry
- 29292 vdb-entry
- FEDORA-2008-4274 vendor-advisory
- 30330 third-party-advisory
- ADV-2008-1582 vdb-entry
- [oss-security] 20080520 Re: CVE ID request: GNUTLS mailing-list
- http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0174
- 30338 third-party-advisory
- [gnutls-devel] 20080519 GnuTLS 2.2.5 - Brown paper bag release mailing-list
- DSA-1581 vendor-advisory
- [oss-security] 20080520 Re: CVE ID request: GNUTLS mailing-list
- FEDORA-2008-4259 vendor-advisory
- 3902 third-party-advisory
- https://issues.rpath.com/browse/RPL-2552
- 30287 third-party-advisory
- http://git.savannah.gnu.org/gitweb/?p=gnutls.git%3Ba=commitdiff%3Bh=bc8102405fda11ea00ca3b42acc4f4bce9d6e97b
- http://www.cert.fi/haavoittuvuudet/advisory-gnutls.html
- gnutls-gnutlsrecvclientkxmessage-bo(42530) vdb-entry
- FEDORA-2008-4183 vendor-advisory
- 1020058 vdb-entry
- MDVSA-2008:106 vendor-advisory
- VU#252626 third-party-advisory