Amazon Linux 1 Security Advisory: ALAS-2012-45
Advisory Release Date: 2012-02-15 17:38 Pacific
Advisory Updated Date: 2014-09-14 15:21 Pacific
Severity:
Medium
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