Due to the way the pam_ssh_agent_auth PAM module was built, the glibc's error() function was called rather than the intended error() function in pam_ssh_agent_auth to report errors. As these two functions expect different arguments, it was possible for an attacker to cause an application using pam_ssh_agent_auth to crash, disclose portions of its memory or, potentially, execute arbitrary code. (CVE-2012-5536 __)
Run yum update openssh to update your system.
i686: openssh-ldap-5.3p1-84.20.amzn1.i686 pam_ssh_agent_auth-0.9.3-84.20.amzn1.i686 openssh-server-5.3p1-84.20.amzn1.i686 openssh-clients-5.3p1-84.20.amzn1.i686 openssh-debuginfo-5.3p1-84.20.amzn1.i686 openssh-5.3p1-84.20.amzn1.i686 src: openssh-5.3p1-84.20.amzn1.src x86_64: openssh-clients-5.3p1-84.20.amzn1.x86_64 openssh-ldap-5.3p1-84.20.amzn1.x86_64 openssh-server-5.3p1-84.20.amzn1.x86_64 openssh-5.3p1-84.20.amzn1.x86_64 openssh-debuginfo-5.3p1-84.20.amzn1.x86_64 pam_ssh_agent_auth-0.9.3-84.20.amzn1.x86_64