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Red Hat Security Advisory 2011-1422-01

Red Hat Security Advisory 2011-1422-01
Posted Nov 3, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-1422-01 - Openswan is a free implementation of Internet Protocol Security and Internet Key Exchange. IPsec uses strong cryptography to provide both authentication and encryption services. These services allow you to build secure tunnels through untrusted networks. A use-after-free flaw was found in the way Openswan's pluto IKE daemon used cryptographic helpers. A remote, authenticated attacker could send a specially-crafted IKE packet that would crash the pluto daemon. This issue only affected SMP systems that have the cryptographic helpers enabled. The helpers are disabled by default on Red Hat Enterprise Linux 5, but enabled by default on Red Hat Enterprise Linux 6.

tags | advisory, remote, protocol
systems | linux, redhat
advisories | CVE-2011-4073
MD5 | 6f64f484d81070fcd2a01dd26eec12d2

Red Hat Security Advisory 2011-1422-01

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

Synopsis: Moderate: openswan security update
Advisory ID: RHSA-2011:1422-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1422.html
Issue date: 2011-11-02
CVE Names: CVE-2011-4073
=====================================================================

1. Summary:

Updated openswan packages that fix one security issue are now available for
Red Hat Enterprise Linux 5 and 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 (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
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 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:

Openswan is a free implementation of Internet Protocol Security (IPsec)
and Internet Key Exchange (IKE). IPsec uses strong cryptography to provide
both authentication and encryption services. These services allow you to
build secure tunnels through untrusted networks.

A use-after-free flaw was found in the way Openswan's pluto IKE daemon used
cryptographic helpers. A remote, authenticated attacker could send a
specially-crafted IKE packet that would crash the pluto daemon. This issue
only affected SMP (symmetric multiprocessing) systems that have the
cryptographic helpers enabled. The helpers are disabled by default on Red
Hat Enterprise Linux 5, but enabled by default on Red Hat Enterprise Linux
6. (CVE-2011-4073)

Red Hat would like to thank the Openswan project for reporting this issue.
Upstream acknowledges Petar Tsankov, Mohammad Torabi Dashti and David Basin
of the information security group at ETH Zurich as the original reporters.

All users of openswan are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After installing
this update, the ipsec service will be restarted automatically.

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/):

748961 - CVE-2011-4073 openswan: use-after-free vulnerability leads to DoS

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/openswan-2.6.21-5.el5_7.6.src.rpm

i386:
openswan-2.6.21-5.el5_7.6.i386.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.i386.rpm
openswan-doc-2.6.21-5.el5_7.6.i386.rpm

x86_64:
openswan-2.6.21-5.el5_7.6.x86_64.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.x86_64.rpm
openswan-doc-2.6.21-5.el5_7.6.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/openswan-2.6.21-5.el5_7.6.src.rpm

i386:
openswan-2.6.21-5.el5_7.6.i386.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.i386.rpm
openswan-doc-2.6.21-5.el5_7.6.i386.rpm

ia64:
openswan-2.6.21-5.el5_7.6.ia64.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.ia64.rpm
openswan-doc-2.6.21-5.el5_7.6.ia64.rpm

ppc:
openswan-2.6.21-5.el5_7.6.ppc.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.ppc.rpm
openswan-doc-2.6.21-5.el5_7.6.ppc.rpm

s390x:
openswan-2.6.21-5.el5_7.6.s390x.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.s390x.rpm
openswan-doc-2.6.21-5.el5_7.6.s390x.rpm

x86_64:
openswan-2.6.21-5.el5_7.6.x86_64.rpm
openswan-debuginfo-2.6.21-5.el5_7.6.x86_64.rpm
openswan-doc-2.6.21-5.el5_7.6.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-2.6.32-4.el6_1.4.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm

x86_64:
openswan-2.6.32-4.el6_1.4.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm
openswan-doc-2.6.32-4.el6_1.4.i686.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.4.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-2.6.32-4.el6_1.4.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm

ppc64:
openswan-2.6.32-4.el6_1.4.ppc64.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.ppc64.rpm

s390x:
openswan-2.6.32-4.el6_1.4.s390x.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.s390x.rpm

x86_64:
openswan-2.6.32-4.el6_1.4.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm
openswan-doc-2.6.32-4.el6_1.4.i686.rpm

ppc64:
openswan-debuginfo-2.6.32-4.el6_1.4.ppc64.rpm
openswan-doc-2.6.32-4.el6_1.4.ppc64.rpm

s390x:
openswan-debuginfo-2.6.32-4.el6_1.4.s390x.rpm
openswan-doc-2.6.32-4.el6_1.4.s390x.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.4.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-2.6.32-4.el6_1.4.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm

x86_64:
openswan-2.6.32-4.el6_1.4.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/openswan-2.6.32-4.el6_1.4.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.4.i686.rpm
openswan-doc-2.6.32-4.el6_1.4.i686.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.4.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-2011-4073.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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