Pantek Library
Hosting Provided By
CybrHost
High Speed Hosting
Mailing Lists: securityfocus.com > bugtraq > 07 > 101422.html (Request Expert securityfocus.com Support)

FreeBSD Security Advisory FreeBSD-SA-07:08.openssl

From: FreeBSD Security Advisories <security-advisories(at)freebsd.org>
Date: Wed Oct 03 2007 - 17:58:30 EDT


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 

FreeBSD-SA-07:08.openssl                                    Security Advisory
                                                          The FreeBSD Project

Topic:          Buffer overflow in OpenSSL SSL_get_shared_ciphers()

Category:       contrib
Module:         openssl
Announced:      2007-10-03
Credits:        Moritz Jodeit
Affects:        All FreeBSD releases.
Corrected:      2007-10-03 21:39:43 UTC (RELENG_6, 6.2-STABLE)
                2007-10-03 21:40:35 UTC (RELENG_6_2, 6.2-RELEASE-p8)
                2007-10-03 21:41:22 UTC (RELENG_6_1, 6.1-RELEASE-p20)
                2007-10-03 21:42:00 UTC (RELENG_5, 5.5-STABLE)
                2007-10-03 21:42:32 UTC (RELENG_5_5, 5.5-RELEASE-p16)
CVE Name:       CVE-2007-5135

For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>.

I. Background

FreeBSD includes software from the OpenSSL Project. The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.

II. Problem Description

A buffer overflow addressed in FreeBSD-SA-06:23.openssl has been found to be incorrectly fixed.

III. Impact

For applications using the SSL_get_shared_ciphers() function, the buffer overflow could allow an attacker to crash or potentially execute arbitrary code with the permissions of the user running the application.

Do you need help?X

IV. Workaround

No workaround is available, but only applications using the SSL_get_shared_ciphers() function are affected.

V. Solution

Perform one of the following:

  1. Upgrade your vulnerable system to 5-STABLE, or 6-STABLE, or to the RELENG_6_2, RELENG_6_1, or RELENG_5_5 security branch dated after the correction date.
  2. To patch your present system:

The following patch have been verified to apply to FreeBSD 5.5, 6.1, and 6.2 systems.

  1. Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility.

# fetch http://security.FreeBSD.org/patches/SA-07:08/openssl.patch
# fetch http://security.FreeBSD.org/patches/SA-07:08/openssl.patch.asc

b) Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch
# cd /usr/src/secure/lib/libssl
# make obj && make depend && make && make install

Do you need more help?X

VI. Correction details

The following list contains the revision numbers of each file that was corrected in FreeBSD. 

Branch                                                           Revision
  Path 
- -------------------------------------------------------------------------
RELENG_5
  src/crypto/openssl/ssl/ssl_lib.c                           1.1.1.11.2.3
RELENG_5_5
  src/UPDATING                                            1.342.2.35.2.16
  src/sys/conf/newvers.sh                                  1.62.2.21.2.18
  src/crypto/openssl/ssl/ssl_lib.c                       1.1.1.11.2.1.4.2
RELENG_6
  src/crypto/openssl/ssl/ssl_lib.c                           1.1.1.12.2.2
RELENG_6_2
  src/UPDATING                                            1.416.2.29.2.11
  src/sys/conf/newvers.sh                                  1.69.2.13.2.11
  src/crypto/openssl/ssl/ssl_lib.c                       1.1.1.12.2.1.2.1
RELENG_6_1
  src/UPDATING                                            1.416.2.22.2.22
  src/sys/conf/newvers.sh                                  1.69.2.11.2.22
  src/crypto/openssl/ssl/ssl_lib.c                           1.1.1.12.6.2
- -------------------------------------------------------------------------

Can we help you?X

VII. References 

http://marc.info/?l=bugtraq&m=119091888624735http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3738http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5135

The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-07:08.openssl.asc -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (FreeBSD)

iD8DBQFHBA+HFdaIBMps37IRAtTQAJ0bFBZt7DVJzhQkUcu7VdNS7Kj8cwCeMQaS cNFjW3j2eolZhlee83l3blo=
=zwC2
-----END PGP SIGNATURE----- Received on Wed Oct 3 19:38:38 2007

This archive was generated by hypermail 2.1.8 : Sun Oct 28 2007 - 06:19:10 EDT

Contact Us  Legal Notices  Order Services Online 
Pantek Home  Privacy Policy  IT news  Site Map  Pantek Library