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: October 24th, 2014
Linux Security Week: October 20th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
FreeBSD: OpenSSL Denial of service vulnerabilities Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
FreeBSD Remote attacker can crash OpenSSL by triggering a null pointer dereference.

FreeBSD-SA-04:05.openssl                                    Security Advisory
                                                          The FreeBSD Project

Topic:          Denial-of-service vulnerability in OpenSSL

Category:       crypto
Module:         openssl
Announced:      2004-03-17
Credits:        OpenSSL Project http://www.openssl.org>
                Codenomicon Ltd http://www.codenomicon.com>
Affects:        All FreeBSD 4.x and 5.x releases
Corrected:      2004-03-17 12:23:51 UTC (RELENG_4, 4.9-STABLE)
                2004-03-17 12:14:12 UTC (RELENG_5_2, 5.2.1-RELEASE-p3)
                2004-03-17 12:14:56 UTC (RELENG_5_1, 5.1-RELEASE-p16)
                2004-03-17 12:17:13 UTC (RELENG_4_9, 4.9-RELEASE-p4)
                2004-03-17 12:18:23 UTC (RELENG_4_8, 4.8-RELEASE-p17)
CVE Name:       CAN-2004-0079
FreeBSD only:   NO

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

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

When processing an SSL/TLS ChangeCipherSpec message, OpenSSL may fail to
check that a new cipher has been previously negotiated.  This may result
in a null pointer dereference.

III. Impact

A remote attacker could perform a specially crafted SSL/TLS handshake
with an application that utilizes OpenSSL, triggering the null pointer
dereference and causing the application to crash.  Depending upon the
specifics of the application, this may result in an effective
denial-of-service.

IV.  Workaround

No workaround is known.

V.   Solution

Perform one of the following:

1) Upgrade your vulnerable system to 4-STABLE; or to the RELENG_5_2,
RELENG_4_9, or RELENG_4_8 security branch dated after the correction
date.

2) To patch your present system:

The following patches have been verified to apply to FreeBSD 4.8,
4.9, 5.1, and 5.2 systems.

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

# fetch  ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:05/openssl.patch
# fetch  ftp://ftp.FreeBSD.org/pub/FreeBSD/CERT/patches/SA-04:05/openssl.patch.asc

b) Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system as described in
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html >.

Note that any statically linked applications that are not part of the
base system (i.e. from the Ports Collection or other 3rd-party sources)
must be recompiled.

All affected applications must be restarted for them to use the
corrected library.  Though not required, rebooting may be the easiest
way to accomplish this.

VI.  Correction details

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

Branch                                                           Revision
  Path
- -------------------------------------------------------------------------
RELENG_4
  src/crypto/openssl/crypto/opensslv.h                        1.1.1.1.2.9
  src/crypto/openssl/ssl/s3_pkt.c                             1.1.1.1.2.7
RELENG_5_2
  src/UPDATING                                                 1.282.2.11
  src/crypto/openssl/crypto/opensslv.h                       1.1.1.14.2.1
  src/crypto/openssl/ssl/s3_pkt.c                             1.1.1.8.4.1
  src/sys/conf/newvers.sh                                       1.56.2.10
RELENG_5_1
  src/UPDATING                                                 1.251.2.18
  src/crypto/openssl/crypto/opensslv.h                       1.1.1.13.2.1
  src/crypto/openssl/ssl/s3_pkt.c                             1.1.1.8.2.1
  src/sys/conf/newvers.sh                                       1.50.2.18
RELENG_4_9
  src/UPDATING                                              1.73.2.89.2.5
  src/crypto/openssl/crypto/opensslv.h                    1.1.1.1.2.8.2.1
  src/crypto/openssl/ssl/s3_pkt.c                         1.1.1.1.2.6.4.1
  src/sys/conf/newvers.sh                                   1.44.2.32.2.5
RELENG_4_8
  src/UPDATING                                             1.73.2.80.2.20
  src/crypto/openssl/crypto/opensslv.h                    1.1.1.1.2.7.2.1
  src/crypto/openssl/ssl/s3_pkt.c                         1.1.1.1.2.6.2.1
  src/sys/conf/newvers.sh                                  1.44.2.29.2.18
- -------------------------------------------------------------------------

VII. References

http://www.openssl.org/news/secadv_20040317.txt >
http://cvs.openssl.org/chngview?cn=12033 >

 
< 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
Disaster as CryptoWall encrypts US firm's entire server installation
Now Everyone Wants to Sell You a Magical Anonymity Router. Choose Wisely
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.