SkipNavigation
Home | FAQ | Contact | Privacy Policy
US-CERT
American Flag
  Vulnerability
Notes
Database

Search Vulnerability Notes

Vulnerability Notes Help Information


 
 View Notes By
  Name

ID Number

CVE Name

Date Public

Date Published

Date Updated

Severity Metric
 Other Documents
  Technical Alerts

Technical Bulletins

Alerts

Security Tips

Vulnerability Note VU#659209

GnuTLS Pad Length Denial of Service

Overview

A vulnerability exists in GnuTLS that may allow a remote attacker to cause a denial of service.

I. Description

GnuTLS contains a vulnerability in gnults-serv that may result in a denial of service when handling a sequence of specially crafted packets. According to CERT-FI Vulnerability Advisory on GnuTLS:

    We have found the flaw by doing complete TLS 1.0 handshake followed by a encrypted Client-Hello message to start abbreviated handshake. In this case the the Record Length field of the TLS Record containing the Client Hello contains erroneus value '8' triggering the bug. Note that this might not be the only way to reproduce the bug.

Note that this issue may affect GnuTLS versions prior to 2.2.5 and also affects version 2.3.0.

II. Impact

A remote, unauthorized attacker may be able to cause a denial of service.

III. Solution

Upgrade or Apply Patch

GnuTLS has issued an upgrade and a patch to address this issue. See GnuTLS Security Advisory SA-2008-01 for more information. GnuTLS is included in various Linux and UNIX distributions. Please consult the relevant documentation of your distribution to obtain the appropriate updates.

Systems Affected

VendorStatusDate NotifiedDate Updated
GnuTLSVulnerable30-May-2008

References


http://www.cert.fi/haavoittuvuudet/advisory-gnutls.html
http://lists.gnu.org/archive/html/gnutls-devel/2008-05/msg00060.html
http://secunia.com/advisories/30287/
http://secunia.com/advisories/30330/

Credit

This issue was reported in GnuTLS Security Advisory SA-2008-01. GnuTLS credits Ossi Herrala and Jukka Taimisto from the CROSS project at Codenomicon Ltd. for reporting this issue.

This document was written by Chris Taschner.

Other Information

Date Public:2008-05-19
Date First Published:2008-05-30
Date Last Updated:2008-05-30
CERT Advisory: 
CVE-ID(s):CVE-2008-1950
NVD-ID(s):CVE-2008-1950
US-CERT Technical Alerts: 
Metric:16.54
Document Revision:15

If you have feedback, comments, or additional information about this vulnerability, please send us email.
 

 
Page Corner Image
Produced 2008 by US-CERT, a government organization
Disclaimers and copyright information
Get Adobe Reader Get Adobe Reader