LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Advisory Watch: July 25th, 2014
Linux Advisory Watch: July 18th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
Gentoo: GnuTLS Execution of arbitrary code Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
Gentoo Multiple vulnerabilities might allow for the execution of arbitrary code in daemons using GnuTLS.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200805-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: High
     Title: GnuTLS: Execution of arbitrary code
      Date: May 21, 2008
      Bugs: #222823
        ID: 200805-20

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Multiple vulnerabilities might allow for the execution of arbitrary
code in daemons using GnuTLS.

Background
==========

GnuTLS is an implementation of Secure Sockets Layer (SSL) 3.0 and
Transport Layer Security (TLS) 1.0, 1.1 and 1.2.

Affected packages
=================

    -------------------------------------------------------------------
     Package          /  Vulnerable  /                      Unaffected
    -------------------------------------------------------------------
  1  net-libs/gnutls       < 2.2.5                            >= 2.2.5

Description
===========

Ossi Herrala and Jukka Taimisto of Codenomicon reported three
vulnerabilities in libgnutls of GnuTLS:

* "Client Hello" messages containing an invalid server name can lead
  to a buffer overflow when evaluating "Security Parameters"
  (CVE-2008-1948).

* Multiple "Client Hello" messages can lead to a NULL pointer
  dereference (CVE-2008-1949).

* A TLS handshake including an encrypted "Client Hello" message and
  an invalid record length could lead to a buffer overread
  (CVE-2008-1950).

Impact
======

Unauthenticated remote attackers could exploit these vulnerabilities to
cause Denial of Service conditions in daemons using GnuTLS. The first
vulnerability (CVE-2008-1948) might allow for the execution of
arbitrary code with the privileges of the daemon handling incoming TLS
connections.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuTLS users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.2.5"

References
==========

  [ 1 ] CVE-2008-1948
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1948
  [ 2 ] CVE-2008-1949
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1949
  [ 3 ] CVE-2008-1950
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1950

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200805-20.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2008 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5
 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
How Hackers Hid a Money-Mining Botnet in Amazonís Cloud
Homeland Security gets into software security
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.