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Category:   Application (VPN)  >   Openswan Vendors:   openswan.org
(Red Hat Issues Fix) Openswan IKE Key Length Null Pointer Dereference Lets Remote Users Deny Service
SecurityTracker Alert ID:  1026147
SecurityTracker URL:  http://securitytracker.com/id/1026147
CVE Reference:   CVE-2011-3380   (Links to External Site)
Date:  Oct 6 2011
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.6.29 - 2.6.35
Description:   A vulnerability was reported in Openswan. A remote user can cause denial of service conditions.

A remote user can send a specially crafted IKE key to trigger a null pointer dereference and cause the target service to crash.

The vulnerability resides in 'programs/pluto/spdb_v1_struct.c'.

Paul Wouters reported this vulnerability.
Impact:   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-2011-1356.html
Vendor URL:  www.openswan.org/download/CVE-2011-3380/CVE-2011-3380.txt (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Oct 6 2011 Openswan IKE Key Length Null Pointer Dereference Lets Remote Users Deny Service


 Source Message Contents
Date:  Wed, 5 Oct 2011 21:52:21 +0000
Subject:  [RHSA-2011:1356-01] Moderate: openswan security update

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

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

Synopsis:          Moderate: openswan security update
Advisory ID:       RHSA-2011:1356-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-1356.html
Issue date:        2011-10-05
CVE Names:         CVE-2011-3380 
=====================================================================

1. Summary:

Updated openswan 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 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 NULL pointer dereference flaw was found in the way Openswan's pluto IKE
daemon handled certain error conditions. A remote, unauthenticated attacker
could send a specially-crafted IKE packet that would crash the pluto
daemon. (CVE-2011-3380)

Red Hat would like to thank the Openswan project for reporting this issue.
Upstream acknowledges Paul Wouters as the original reporter.

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/):

742065 - CVE-2011-3380 openswan: IKE invalid key length allows remote unauthenticated user to crash openswan

6. Package List:

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_1.2.src.rpm

i386:
openswan-2.6.32-4.el6_1.2.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm

x86_64:
openswan-2.6.32-4.el6_1.2.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.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_1.2.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm
openswan-doc-2.6.32-4.el6_1.2.i686.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.2.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.2.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_1.2.src.rpm

i386:
openswan-2.6.32-4.el6_1.2.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm

ppc64:
openswan-2.6.32-4.el6_1.2.ppc64.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.ppc64.rpm

s390x:
openswan-2.6.32-4.el6_1.2.s390x.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.s390x.rpm

x86_64:
openswan-2.6.32-4.el6_1.2.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.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_1.2.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm
openswan-doc-2.6.32-4.el6_1.2.i686.rpm

ppc64:
openswan-debuginfo-2.6.32-4.el6_1.2.ppc64.rpm
openswan-doc-2.6.32-4.el6_1.2.ppc64.rpm

s390x:
openswan-debuginfo-2.6.32-4.el6_1.2.s390x.rpm
openswan-doc-2.6.32-4.el6_1.2.s390x.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.2.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.2.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_1.2.src.rpm

i386:
openswan-2.6.32-4.el6_1.2.i686.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm

x86_64:
openswan-2.6.32-4.el6_1.2.x86_64.rpm
openswan-debuginfo-2.6.32-4.el6_1.2.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_1.2.src.rpm

i386:
openswan-debuginfo-2.6.32-4.el6_1.2.i686.rpm
openswan-doc-2.6.32-4.el6_1.2.i686.rpm

x86_64:
openswan-debuginfo-2.6.32-4.el6_1.2.x86_64.rpm
openswan-doc-2.6.32-4.el6_1.2.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-2011-3380.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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