ISS X-Force Database: gnutls-gnutlsservernamerecvparams-bo(42532): GnuTLS _gnutls_server_name_recv

GnuTLS _gnutls_server_name_recv_params() buffer overflow

gnutls-gnutlsservernamerecvparams-bo (42532)

High Risk

Description:

GnuTLS is vulnerable to a heap-based buffer overflow, caused by improper validation of data by the _gnutls_server_name_recv_params function. By sending a TLS 1.0 Client Hello message containing a specially-crafted server name extension, a remote attacker could overflow a buffer and execute arbitrary code on the system with elevated privileges or cause the application to crash.

*CVSS:

Base Score:	7.5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	Partial
Availability Impact:	Partial

Temporal Score:	5.5
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

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-2008-1948: The _gnutls_server_name_recv_params function in lib/ext_server_name.c in libgnutls in gnutls-serv in GnuTLS before 2.2.4 does not properly calculate the number of Server Names in a TLS 1.0 Client Hello message during extension handling, which allows remote attackers to cause a denial of service (crash) or possibly execute arbitrary code via a zero value for the length of Server Names, which leads to a buffer overflow in session resumption data in the pack_security_parameters function, aka GNUTLS-SA-2008-1-1.
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: 1020057: GnuTLS Server Name Validation Flaw Lets Remote Users Deny Service
SUSE-SA:2008:046: gnutls security problems
US-CERT VU#111034: GnuTLS Server Name extension 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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