ALAS-2013-233


Amazon Linux AMI Security Advisory: ALAS-2013-233
Advisory Release Date: 2014-09-16 21:43 Pacific
Severity: Medium

Issue Overview:

The do_tkill function in kernel/signal.c in the Linux kernel before 3.8.9 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory via a crafted application that makes a (1) tkill or (2) tgkill system call.

The udp_v6_push_pending_frames function in net/ipv6/udp.c in the IPv6 implementation in the Linux kernel through 3.10.3 makes an incorrect function call for pending data, which allows local users to cause a denial of service (BUG and system crash) via a crafted application that uses the UDP_CORK option in a setsockopt system call.

net/ipv6/ip6_output.c in the Linux kernel through 3.11.4 does not properly determine the need for UDP Fragmentation Offload (UFO) processing of small packets after the UFO queueing of a large packet, which allows remote attackers to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact via network traffic that triggers a large response packet.

The __request_module function in kernel/kmod.c in the Linux kernel before 3.4 does not set a certain killable attribute, which allows local users to cause a denial of service (memory consumption) via a crafted application.

Interpretation conflict in drivers/md/dm-snap-persistent.c in the Linux kernel through 3.11.6 allows remote authenticated users to obtain sensitive information or modify data via a crafted mapping to a snapshot block device.


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system. You will need to reboot your system in order for the new kernel to be running.

New Packages:
i686:
    kernel-devel-3.4.66-55.43.amzn1.i686
    kernel-debuginfo-common-i686-3.4.66-55.43.amzn1.i686
    kernel-debuginfo-3.4.66-55.43.amzn1.i686
    kernel-3.4.66-55.43.amzn1.i686
    kernel-tools-debuginfo-3.4.66-55.43.amzn1.i686
    kernel-headers-3.4.66-55.43.amzn1.i686
    kernel-tools-3.4.66-55.43.amzn1.i686

noarch:
    kernel-doc-3.4.66-55.43.amzn1.noarch

src:
    kernel-3.4.66-55.43.amzn1.src

x86_64:
    kernel-3.4.66-55.43.amzn1.x86_64
    kernel-debuginfo-common-x86_64-3.4.66-55.43.amzn1.x86_64
    kernel-tools-3.4.66-55.43.amzn1.x86_64
    kernel-headers-3.4.66-55.43.amzn1.x86_64
    kernel-debuginfo-3.4.66-55.43.amzn1.x86_64
    kernel-tools-debuginfo-3.4.66-55.43.amzn1.x86_64
    kernel-devel-3.4.66-55.43.amzn1.x86_64