Ubuntu Security Notice (C) 2005-2016 Canonical, Inc. / NASL script (C) 2006-2016 Tenable Network Security, Inc.
The remote Ubuntu host is missing one or more security-related
Alexander Nyberg discovered an integer overflow in the
sysfs_write_file() function. A local attacker could exploit this to
crash the kernel or possibly even execute arbitrary code with root
privileges by writing to an user-writable file in /sys under certain
low-memory conditions. However, there are very few cases where a
user-writeable sysfs file actually exists. (CAN-2005-0867)
Olof Johansson discovered a Denial of Service vulnerability in the
futex functions, which provide semaphores for exclusive locking of
resources. A local attacker could possibly exploit this to cause a
kernel deadlock. (CAN-2005-0937)
In addition this update fixes two race conditions in the ext3 and jfs
file system drivers, which could lead to a kernel crash under certain
(unusual) conditions. However, these cannot easily be triggered by
users, thus they are not security sensitive.
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.
Update the affected packages.
Risk factor :
High / CVSS Base Score : 7.2