[ALAS-2013-252] Amazon Linux AMI 2012.09 - ALAS-2013-252: medium priority package update for kernel

Package updates are available for Amazon Linux AMI that fix the following vulnerabilities:
CVE-2013-4470:
The Linux kernel before 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly initialize certain data structures, which allows local users to cause a denial of service (memory corruption and system crash) or possibly gain privileges via a crafted application that uses the UDP_CORK option in a setsockopt system call and sends both short and long packets, related to the ip_ufo_append_data function in net/ipv4/ip_output.c and the ip6_ufo_append_data function in net/ipv6/ip6_output.c.
1023477:
CVE-2013-4470 Kernel: net: memory corruption with UDP_CORK and UFO

CVE-2013-4348:
The skb_flow_dissect function in net/core/flow_dissector.c in the Linux kernel through 3.12 allows remote attackers to cause a denial of service (infinite loop) via a small value in the IHL field of a packet with IPIP encapsulation.
1007939:
CVE-2013-4348 kernel: net: deadloop path in skb_flow_dissect()