ALAS-2012-045


Amazon Linux AMI Security Advisory: ALAS-2012-45
Advisory Release Date: 2014-09-14 15:21 Pacific
Severity: Medium
References: CVE-2011-4086 

Issue Overview:

The journal_unmap_buffer function in fs/jbd2/transaction.c in the Linux kernel before 3.3.1 does not properly handle the _Delay and _Unwritten buffer head states, which allows local users to cause a denial of service (system crash) by leveraging the presence of an ext4 filesystem that was mounted with a journal.


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-debuginfo-common-i686-2.6.35.14-107.1.36.amzn1.i686
    kernel-debuginfo-2.6.35.14-107.1.36.amzn1.i686
    kernel-headers-2.6.35.14-107.1.36.amzn1.i686
    kernel-devel-2.6.35.14-107.1.36.amzn1.i686
    kernel-2.6.35.14-107.1.36.amzn1.i686
    perf-2.6.35.14-107.1.36.amzn1.i686

noarch:
    kernel-doc-2.6.35.14-107.1.36.amzn1.noarch

src:
    kernel-2.6.35.14-107.1.36.amzn1.src

x86_64:
    perf-2.6.35.14-107.1.36.amzn1.x86_64
    kernel-devel-2.6.35.14-107.1.36.amzn1.x86_64
    kernel-debuginfo-common-x86_64-2.6.35.14-107.1.36.amzn1.x86_64
    kernel-headers-2.6.35.14-107.1.36.amzn1.x86_64
    kernel-2.6.35.14-107.1.36.amzn1.x86_64
    kernel-debuginfo-2.6.35.14-107.1.36.amzn1.x86_64