ISS X-Force Database: gnutls-gnutlsrecvclientkxmessage-dos(42530): GnuTLS _gnutls_recv_client_kx

GnuTLS _gnutls_recv_client_kx_message() denial of service

gnutls-gnutlsrecvclientkxmessage-dos (42530)

High Risk

Description:

GnuTLS is vulnerable to a denial of service, caused by a NULL pointer dereference in the _gnutls_recv_client_kx_message function. By sending a TLS record containing multiple Client Hello handshake messages, a remote attacker could cause the service to crash.

*CVSS:

Base Score:	5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Partial

Temporal Score:	3.7
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of GnuTLS (2.2.5 or later), available from the GNU TLS Library Project Web site. See References.

For other distributions:
Apply the appropriate update for your system. See References.

References:

BugTraq Mailing List, Tue May 20 2008 - 09:17:09 CDT: Vulnerability Advisory on GnuTLS.
FICORA #130447: CERT-FI Vulnerability Advisory on GnuTLS.
GNU TLS Library Project Web site: The GNU Transport Layer Security Library.
gnutls-devel Mailing List, Mon, 19 May 2008 22:54:43 +0200: GnuTLS 2.2.5 - Brown paper bag release.
VideoLAN Web site: Changes between 0.8.6g and 0.8.6h.
ASA-2008-261: gnutls security update (RHSA-2008-0492)
BID-29292: GnuTLS Prior to 2.2.5 Multiple Remote Vulnerabilities
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.
DSA-1581: gnutls13 -- several vulnerabilities
GLSA-200805-20: GnuTLS: Execution of arbitrary code
MDVSA-2008:106: Updated gnutls packages fix denial of service vulnerabilities
RHSA-2008-0489: Critical: gnutls security update
RHSA-2008-0492: Important: gnutls security update
SA30287: GnuTLS Multiple Vulnerabilities
SA30330: FileZilla GnuTLS Multiple Vulnerabilities
SA30560: VLC Media Player GnuTLS and Libxml2 Vulnerabilities
SECTRACK ID: 1020058: GnuTLS Null Pointer Dereference in Processing Client Hello Messages Lets Remote Users Deny Service
SUSE-SA:2008:046: gnutls security problems
US-CERT VU#252626: GnuTLS Client Hello repeat Denial of Service
USN-613-1: GnuTLS vulnerabilities
VUPEN/ADV-2008-1582: GnuTLS Data Handling Buffer Overflow and Denial of Service Issues
VUPEN/ADV-2008-1583: FileZilla GnuTLS Buffer Overflow and Denial of Service Vulnerabilities
VUPEN/ADV-2008-1762: VLC Security Update Fixes GnuTLS and Libxml2 Vulnerabilities

Platforms Affected:

Canonical Ubuntu 6.06 LTS
Canonical Ubuntu 7.04
Canonical Ubuntu 7.10
Canonical Ubuntu 8.04 LTS
Debian Debian Linux 4.0
Gentoo Linux
GNU GnuTLS 1.0.18
GNU GnuTLS 1.0.19
GNU GnuTLS 1.0.20
GNU GnuTLS 1.0.21
GNU GnuTLS 1.0.22
GNU GnuTLS 1.0.23
GNU GnuTLS 1.0.24
GNU GnuTLS 1.0.25
GNU GnuTLS 1.1.13
GNU GnuTLS 1.1.14
GNU GnuTLS 1.1.15
GNU GnuTLS 1.1.16
GNU GnuTLS 1.1.17
GNU GnuTLS 1.1.18
GNU GnuTLS 1.1.19
GNU GnuTLS 1.1.20
GNU GnuTLS 1.1.21
GNU GnuTLS 1.1.22
GNU GnuTLS 1.1.23
GNU GnuTLS 1.2.0
GNU GnuTLS 1.2.1
GNU GnuTLS 1.2.10
GNU GnuTLS 1.2.11
GNU GnuTLS 1.2.2
GNU GnuTLS 1.2.3
GNU GnuTLS 1.2.4
GNU GnuTLS 1.2.5
GNU GnuTLS 1.2.6
GNU GnuTLS 1.2.7
GNU GnuTLS 1.2.8
GNU GnuTLS 1.2.9
GNU GnuTLS 1.3.0
GNU GnuTLS 1.3.1
GNU GnuTLS 1.3.2
GNU GnuTLS 1.3.3
GNU GnuTLS 1.3.4
GNU GnuTLS 1.3.5
GNU GnuTLS 1.4.0
GNU GnuTLS 1.4.1
GNU GnuTLS 1.4.5
GNU GnuTLS 1.6.3
GNU GnuTLS 2.0.4
GNU GnuTLS 2.2.0
GNU GnuTLS 2.2.1
GNU GnuTLS 2.2.2
GNU GnuTLS 2.2.3
MandrakeSoft Mandrake Linux 2007.1 X86_64
MandrakeSoft Mandrake Linux 2007.1
MandrakeSoft Mandrake Linux 2008.0 X86_64
MandrakeSoft Mandrake Linux 2008.0
MandrakeSoft Mandrake Linux 2008.1 X86_64
MandrakeSoft Mandrake Linux 2008.1
MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
MandrakeSoft Mandrake Linux Corporate Server 4.0
Novell Linux Desktop 9
Novell Linux POS 9
Novell Open Enterprise Server
Novell OpenSUSE 10.2
Novell OpenSUSE 10.3
Novell OpenSUSE 11.0
Novell SUSE Linux Enterprise 10 SP2 DEBUGINFO
Novell SUSE Linux Enterprise Desktop 10 SP2
Novell SUSE Linux Enterprise Desktop 10 SP1
Novell SUSE Linux Enterprise Server 10 SP1
Novell SUSE Linux Enterprise Server 10 SP2
RedHat Enterprise Linux 4 Desktop
RedHat Enterprise Linux 4 AS
RedHat Enterprise Linux 4 ES
RedHat Enterprise Linux 4 WS
RedHat Enterprise Linux 5 Client Workstation
RedHat Enterprise Linux 5 Client
RedHat Enterprise Linux 5
SuSE SuSE SLES 9
VideoLAN VLC Media Player 0.8.6g

Reported:

May 19, 2008

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