It was discovered that dracut created initramfs images as world readable. A local user could possibly use this flaw to obtain sensitive information from these files, such as iSCSI authentication passwords, encrypted root file system crypttab passwords, or other information. (CVE-2012-4453 __)
Run yum update dracut to update your system.
noarch: dracut-tools-004-336.21.amzn1.noarch dracut-004-336.21.amzn1.noarch dracut-caps-004-336.21.amzn1.noarch dracut-kernel-004-336.21.amzn1.noarch dracut-fips-004-336.21.amzn1.noarch dracut-generic-004-336.21.amzn1.noarch dracut-fips-aesni-004-336.21.amzn1.noarch dracut-network-004-336.21.amzn1.noarch src: dracut-004-336.21.amzn1.src