Synopsis:    Moderate: openswan security update
Issue Date:  2011-11-02
CVE Numbers: CVE-2011-4073


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 
Scientific Linux 5, but enabled by default on Scientific Linux
6. (CVE-2011-4073)

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.

SL5:
  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
SL6:
  i386
     openswan-2.6.32-4.el6_1.4.i686.rpm
     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-2.6.32-4.el6_1.4.x86_64.rpm
     openswan-debuginfo-2.6.32-4.el6_1.4.x86_64.rpm
     openswan-doc-2.6.32-4.el6_1.4.x86_64.rpm

- Scientific Linux Development Team