Important: openswan

Issue Overview:

A buffer overflow flaw was found in Openswan. If Opportunistic Encryption were enabled (“oe=yes” in “/etc/ipsec.conf”) and an RSA key configured, an attacker able to cause a system to perform a DNS lookup for an attacker-controlled domain containing malicious records (such as by sending an email that triggers a DKIM or SPF DNS record lookup) could cause Openswan’s pluto IKE daemon to crash or, potentially, execute arbitrary code with root privileges. With “oe=yes” but no RSA key configured, the issue can only be triggered by attackers on the local network who can control the reverse DNS entry of the target system. Opportunistic Encryption is disabled by default. (CVE-2013-2053)

Affected Packages:

openswan

Issue Correction:
Run yum update openswan to update your system.

New Packages:

i686:  
    openswan-doc-2.6.37-2.16.amzn1.i686  
    openswan-debuginfo-2.6.37-2.16.amzn1.i686  
    openswan-2.6.37-2.16.amzn1.i686  
  
src:  
    openswan-2.6.37-2.16.amzn1.src  
  
x86_64:  
    openswan-2.6.37-2.16.amzn1.x86_64  
    openswan-debuginfo-2.6.37-2.16.amzn1.x86_64  
    openswan-doc-2.6.37-2.16.amzn1.x86_64  

Additional References

Red Hat: CVE-2013-2053

Mitre: CVE-2013-2053