[ GLSA 201206-18 ] GnuTLS: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: GnuTLS: Multiple vulnerabilities (GLSA 201206-18)
Severity: normal
Exploitable: remote
Date: June 23, 2012
Bug(s): #281224, #292025, #389947, #409287
ID: 201206-18

Synopsis

Multiple vulnerabilities have been found in GnuTLS, allowing a
remote attacker to perform man-in-the-middle or Denial of Service attacks.


Background

GnuTLS is an Open Source implementation of the TLS 1.2 and SSL 3.0
protocols.


Affected Packages

Package: net-libs/gnutls
Vulnerable: < 2.12.18
Unaffected: >= 2.12.18
Architectures: All supported architectures


Description

Multiple vulnerabilities have been found in GnuTLS:

• An error in libgnutls does not properly sanitize "" characters from
  certificate fields (CVE-2009-2730).
  
• An error in the TLS and SSL protocols mistreats renegotiation
  handshakes (CVE-2009-3555).
  
• A boundary error in the "gnutls_session_get_data()" function in
  gnutls_session.c could cause a buffer overflow (CVE-2011-4128).
  
• An error in the "_gnutls_ciphertext2compressed()" function in
  gnutls_cipher.c could cause memory corruption (CVE-2012-1573).
  

Impact

A remote attacker could perform man-in-the-middle attacks to spoof
arbitrary SSL servers or cause a Denial of Service condition in
applications linked against GnuTLS.


Workaround

There is no known workaround at this time.

Resolution

All GnuTLS users should upgrade to the latest version: