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