Ubuntu Security Notice USN-2662-1
7th July, 2015
linux-lts-trusty vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 12.04 LTS
Summary
Several security issues were fixed in the kernel.
Software description
- linux-lts-trusty
– Linux hardware enablement kernel from Trusty
Details
Alexandre Oliva reported a race condition flaw in the btrfs file system’s
handling of extended attributes (xattrs). A local attacker could exploit
this flaw to bypass ACLs and potentially escalate privileges.
(CVE-2014-9710)
A race condition was discovered in the Linux kernel’s file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)
A underflow error was discovered in the Linux kernel’s Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)
A bounds check error was discovered in the Linux kernel’s Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)
A division by zero error was discovered in the Linux kernel’s Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)
Carl H Lunde discovered missing sanity checks in the the Linux kernel’s UDF
file system (CONFIG_UDF_FS). A local attacker could exploit this flaw to
cause a denial of service (system crash) by using a corrupted file system
image. (CVE-2015-4167)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 12.04 LTS:
-
linux-image-3.13.0-57-generic-lpae
3.13.0-57.95~precise1
-
linux-image-3.13.0-57-generic
3.13.0-57.95~precise1
To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.