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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Red Hat Issues Fix) OpenSSL ECDH Ciphersuite and CRL Update Bugs Lets Remote Users Deny Service and Bypass CRL Updates
SecurityTracker Alert ID:  1026245
SecurityTracker URL:  http://securitytracker.com/id/1026245
CVE Reference:   CVE-2011-3207   (Links to External Site)
Date:  Oct 26 2011
Impact:   Denial of service via network, Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 0.9.8 through 0.9.8s, 1.0.0 through 1.0.0d
Description:   Two vulnerabilities were reported in OpenSSL. A remote user can cause denial of service conditions. A remote user may be able to bypass CRL updates.

The internal certificate verification routines may incorrectly accept a certificate revocation list (CRL) with a nextUpdate field value that is in the past [CVE-2011-3207]. Applications that enable the internal CRL checking [not the default setting] are affected. Only versions 1.0.0 through 1.0.0d are affected.

Kaspar Brand reported this vulnerability.

A remote user can send a specially crafted, out of order handshake message to exploit a flaw in the ephemeral ECDH ciphersuite code and cause the service to crash [CVE-2011-3210].

Adam Langley reported this vulnerability.
Impact:   A remote user can cause the target service to crash.

A remote user may be able to bypass CRL updates.
Solution:   Red Hat has issued a fix for CVE-2011-3207.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2011-1409.html
Vendor URL:  openssl.org/news/secadv_20110906.txt (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Sep 6 2011 OpenSSL ECDH Ciphersuite and CRL Update Bugs Lets Remote Users Deny Service and Bypass CRL Updates


 Source Message Contents
Date:  Wed, 26 Oct 2011 17:26:20 +0000
Subject:  [RHSA-2011:1409-01] Moderate: openssl security update

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

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

Synopsis:          Moderate: openssl security update
Advisory ID:       RHSA-2011:1409-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-1409.html
Issue date:        2011-10-26
CVE Names:         CVE-2011-3207 
=====================================================================

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 moderate
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.

An uninitialized variable use flaw was found in OpenSSL. This flaw could
cause an application using the OpenSSL Certificate Revocation List (CRL)
checking functionality to incorrectly accept a CRL that has a nextUpdate
date in the past. (CVE-2011-3207)

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
https://access.redhat.com/kb/docs/DOC-11259

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

736087 - CVE-2011-3207 openssl: CRL verification vulnerability

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/openssl-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm

x86_64:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.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-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm
openssl-perl-1.0.0-10.el6_1.5.i686.rpm
openssl-static-1.0.0-10.el6_1.5.i686.rpm

x86_64:
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.x86_64.rpm
openssl-perl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-static-1.0.0-10.el6_1.5.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-1.0.0-10.el6_1.5.src.rpm

x86_64:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.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-1.0.0-10.el6_1.5.src.rpm

x86_64:
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.x86_64.rpm
openssl-perl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-static-1.0.0-10.el6_1.5.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/openssl-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm

ppc64:
openssl-1.0.0-10.el6_1.5.ppc.rpm
openssl-1.0.0-10.el6_1.5.ppc64.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.ppc.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.ppc64.rpm
openssl-devel-1.0.0-10.el6_1.5.ppc.rpm
openssl-devel-1.0.0-10.el6_1.5.ppc64.rpm

s390x:
openssl-1.0.0-10.el6_1.5.s390.rpm
openssl-1.0.0-10.el6_1.5.s390x.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.s390.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.s390x.rpm
openssl-devel-1.0.0-10.el6_1.5.s390.rpm
openssl-devel-1.0.0-10.el6_1.5.s390x.rpm

x86_64:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.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-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-perl-1.0.0-10.el6_1.5.i686.rpm
openssl-static-1.0.0-10.el6_1.5.i686.rpm

ppc64:
openssl-debuginfo-1.0.0-10.el6_1.5.ppc64.rpm
openssl-perl-1.0.0-10.el6_1.5.ppc64.rpm
openssl-static-1.0.0-10.el6_1.5.ppc64.rpm

s390x:
openssl-debuginfo-1.0.0-10.el6_1.5.s390x.rpm
openssl-perl-1.0.0-10.el6_1.5.s390x.rpm
openssl-static-1.0.0-10.el6_1.5.s390x.rpm

x86_64:
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-perl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-static-1.0.0-10.el6_1.5.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/openssl-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm

x86_64:
openssl-1.0.0-10.el6_1.5.i686.rpm
openssl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-devel-1.0.0-10.el6_1.5.i686.rpm
openssl-devel-1.0.0-10.el6_1.5.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-1.0.0-10.el6_1.5.src.rpm

i386:
openssl-debuginfo-1.0.0-10.el6_1.5.i686.rpm
openssl-perl-1.0.0-10.el6_1.5.i686.rpm
openssl-static-1.0.0-10.el6_1.5.i686.rpm

x86_64:
openssl-debuginfo-1.0.0-10.el6_1.5.x86_64.rpm
openssl-perl-1.0.0-10.el6_1.5.x86_64.rpm
openssl-static-1.0.0-10.el6_1.5.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-3207.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2011 Red Hat, Inc.
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