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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Red Hat Issues Fix) OpenSSL Buffer Overflow in TLS Server Extension Parsing May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1024744
SecurityTracker URL:  http://securitytracker.com/id/1024744
CVE Reference:   CVE-2010-3864   (Links to External Site)
Date:  Nov 16 2010
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.8f through 0.9.8o; also 1.0.0, 1.0.0a
Description:   A vulnerability was reported in OpenSSL. A remote user can cause denial of service conditions. A remote user may be able to execute arbitrary code on the target system.

A remote user can send specially crafted data to exploit a TLS extension parsing race condition and trigger a buffer overflow, causing the target service to crash or potentially execute arbitrary code.

Multi-threaded TLS server applications that use OpenSSL's internal caching mechanism are affected.

The Apache HTTP server and Stunnel are not affected.

Rob Hulswit reported this vulnerability.
Impact:   A remote user may be able to execute arbitrary code on the target system.

A remote user can cause denial of service conditions.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2010-0888.html
Vendor URL:  www.openssl.org/news/secadv_20101116.txt (Links to External Site)
Cause:   Boundary error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Nov 16 2010 OpenSSL Buffer Overflow in TLS Server Extension Parsing May Let Remote Users Execute Arbitrary Code


 Source Message Contents
Date:  Tue, 16 Nov 2010 12:04:28 -0500
Subject:  [RHSA-2010:0888-01] Important: openssl security update

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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: openssl security update
Advisory ID:       RHSA-2010:0888-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0888.html
Issue date:        2010-11-16
CVE Names:         CVE-2010-3864 
=====================================================================

1. Summary:

Updated openssl packages that fix one security issue are now available for
Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3)
and Transport Layer Security (TLS v1) protocols, as well as a
full-strength, general purpose cryptography library.

A race condition flaw has been found in the OpenSSL TLS server extension
parsing code, which could affect some multithreaded OpenSSL applications.
Under certain specific conditions, it may be possible for a remote attacker
to trigger this race condition and cause such an application to crash, or
possibly execute arbitrary code with the permissions of the application.
(CVE-2010-3864)

Note that this issue does not affect the Apache HTTP Server. Refer to Red
Hat Bugzilla bug 649304 for more technical details on how to determine if
your application is affected.

Red Hat would like to thank Rob Hulswit for reporting this issue.

All OpenSSL users should upgrade to these updated packages, which contain a
backported patch to resolve this issue. For the update to take effect, all
services linked to the OpenSSL library must be restarted, or the system
rebooted.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

649304 - CVE-2010-3864 OpenSSL TLS extension parsing race condition

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm

x86_64:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm
openssl-perl-1.0.0-4.el6_0.1.i686.rpm
openssl-static-1.0.0-4.el6_0.1.i686.rpm

x86_64:
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.x86_64.rpm
openssl-perl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-static-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

x86_64:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

x86_64:
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.x86_64.rpm
openssl-perl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-static-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm

ppc64:
openssl-1.0.0-4.el6_0.1.ppc.rpm
openssl-1.0.0-4.el6_0.1.ppc64.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.ppc.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.ppc64.rpm
openssl-devel-1.0.0-4.el6_0.1.ppc.rpm
openssl-devel-1.0.0-4.el6_0.1.ppc64.rpm

s390x:
openssl-1.0.0-4.el6_0.1.s390.rpm
openssl-1.0.0-4.el6_0.1.s390x.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.s390.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.s390x.rpm
openssl-devel-1.0.0-4.el6_0.1.s390.rpm
openssl-devel-1.0.0-4.el6_0.1.s390x.rpm

x86_64:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-perl-1.0.0-4.el6_0.1.i686.rpm
openssl-static-1.0.0-4.el6_0.1.i686.rpm

ppc64:
openssl-debuginfo-1.0.0-4.el6_0.1.ppc64.rpm
openssl-perl-1.0.0-4.el6_0.1.ppc64.rpm
openssl-static-1.0.0-4.el6_0.1.ppc64.rpm

s390x:
openssl-debuginfo-1.0.0-4.el6_0.1.s390x.rpm
openssl-perl-1.0.0-4.el6_0.1.s390x.rpm
openssl-static-1.0.0-4.el6_0.1.s390x.rpm

x86_64:
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-perl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-static-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm

x86_64:
openssl-1.0.0-4.el6_0.1.i686.rpm
openssl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-devel-1.0.0-4.el6_0.1.i686.rpm
openssl-devel-1.0.0-4.el6_0.1.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/openssl-1.0.0-4.el6_0.1.src.rpm

i386:
openssl-debuginfo-1.0.0-4.el6_0.1.i686.rpm
openssl-perl-1.0.0-4.el6_0.1.i686.rpm
openssl-static-1.0.0-4.el6_0.1.i686.rpm

x86_64:
openssl-debuginfo-1.0.0-4.el6_0.1.x86_64.rpm
openssl-perl-1.0.0-4.el6_0.1.x86_64.rpm
openssl-static-1.0.0-4.el6_0.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-3864.html
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2010 Red Hat, Inc.
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