ALAS-2014-392


Amazon Linux AMI Security Advisory: ALAS-2014-392
Advisory Release Date: 2014-09-19 11:43 Pacific
Severity: Medium

Issue Overview:

The media_device_enum_entities function in drivers/media/media-device.c in the Linux kernel before 3.14.6 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory by leveraging /dev/media0 read access for a MEDIA_IOC_ENUM_ENTITIES ioctl call.

A flaw was found in the way the Linux kernel's futex subsystem handled the requeuing of certain Priority Inheritance (PI) futexes. A local, unprivileged user could use this flaw to escalate their privileges on the system.

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.


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:
    perf-debuginfo-3.10.53-56.140.amzn1.i686
    kernel-headers-3.10.53-56.140.amzn1.i686
    perf-3.10.53-56.140.amzn1.i686
    kernel-3.10.53-56.140.amzn1.i686
    kernel-debuginfo-3.10.53-56.140.amzn1.i686
    kernel-debuginfo-common-i686-3.10.53-56.140.amzn1.i686
    kernel-devel-3.10.53-56.140.amzn1.i686

noarch:
    kernel-doc-3.10.53-56.140.amzn1.noarch

src:
    kernel-3.10.53-56.140.amzn1.src

x86_64:
    kernel-headers-3.10.53-56.140.amzn1.x86_64
    kernel-3.10.53-56.140.amzn1.x86_64
    kernel-debuginfo-3.10.53-56.140.amzn1.x86_64
    kernel-devel-3.10.53-56.140.amzn1.x86_64
    kernel-debuginfo-common-x86_64-3.10.53-56.140.amzn1.x86_64
    perf-3.10.53-56.140.amzn1.x86_64
    perf-debuginfo-3.10.53-56.140.amzn1.x86_64