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Red Hat Enterprise Linux: RHSA-2011-1422-01 Moderate: Openswan DoS Issue

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Calendar Grey November 2, 2011
Scroller Redhat
Red Hat releases new openswan packages that tackle a moderate security vulnerability. Discover further information regarding the update specifics.
Updated openswan packages that fix one security issue are now available for Red Hat Enterprise Linux 5 and 6

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

Summary

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.

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux moderate impact cryptography openswan

References

https://access.redhat.com/security/cve/CVE-2011-4073 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
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:
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:
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:
i386:

Read the Full Advisory


Advisory ID: RHSA-2011:1422-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1422.html
Issue date: 2011-11-02

Topic

Updated openswan packages that fix one security issue are now available forRed Hat Enterprise Linux 5 and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory DoS Red Hat Enterprise Linux moderate impact cryptography openswan

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

Bugs Fixed

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

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