7.2 - USN-1141-1

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.04 LTS

Summary:

Multiple kernel vulnerabilities have been fixed.

Software Description: - linux: Linux kernel - linux-ec2: Linux kernel for EC2

Details:

Brad Spengler discovered that the kernel did not correctly account for userspace memory allocations during exec() calls. A local attacker could exploit this to consume all system memory, leading to a denial of service. (CVE-2010-4243)

Alexander Duyck discovered that the Intel Gigabit Ethernet driver did not correctly handle certain configurations. If such a device was configured without VLANs, a remote attacker could crash the system, leading to a denial of service. (CVE-2010-4263)

Nelson Elhage discovered that Econet did not correctly handle AUN packets over UDP. A local attacker could send specially crafted traffic to crash the system, leading to a denial of service. (CVE-2010-4342)

Dan Rosenberg discovered that IRDA did not correctly check the size of buffers. On non-x86 systems, a local attacker could exploit this to read kernel heap memory, leading to a loss of privacy. (CVE-2010-4529)

Dan Rosenburg discovered that the CAN subsystem leaked kernel addresses into the /proc filesystem. A local attacker could use this to increase the chances of a successful memory corruption exploit. (CVE-2010-4565)

Kees Cook discovered that the IOWarrior USB device driver did not correctly check certain size fields. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2010-4656)

Goldwyn Rodrigues discovered that the OCFS2 filesystem did not correctly clear memory when writing certain file holes. A local attacker could exploit this to read uninitialized data from the disk, leading to a loss of privacy. (CVE-2011-0463)

Dan Carpenter discovered that the TTPCI DVB driver did not check certain values during an ioctl. If the dvb-ttpci module was loaded, a local attacker could exploit this to crash the system, leading to a denial of service, or possibly gain root privileges. (CVE-2011-0521)

Jens Kuehnel discovered that the InfiniBand driver contained a race condition. On systems using InfiniBand, a local attacker could send specially crafted requests to crash the system, leading to a denial of service. (CVE-2011-0695)

Rafael Dominguez Vega discovered that the caiaq Native Instruments USB driver did not correctly validate string lengths. A local attacker with physical access could plug in a specially crafted USB device to crash the system or potentially gain root privileges. (CVE-2011-0712)

Kees Cook reported that /proc/pid/stat did not correctly filter certain memory locations. A local attacker could determine the memory layout of processes in an attempt to increase the chances of a successful memory corruption exploit. (CVE-2011-0726)

Timo Warns discovered that MAC partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system or potentially gain root privileges. (CVE-2011-1010)

Timo Warns discovered that LDM partition parsing routines did not correctly calculate block counts. A local attacker with physical access could plug in a specially crafted block device to crash the system, leading to a denial of service. (CVE-2011-1012)

Matthiew Herrb discovered that the drm modeset interface did not correctly handle a signed comparison. A local attacker could exploit this to crash the system or possibly gain root privileges. (CVE-2011-1013)

Marek Olšák discovered that the Radeon GPU drivers did not correctly validate certain registers. On systems with specific hardware, a local attacker could exploit this to write to arbitrary video memory. (CVE-2011-1016)

Vasiliy Kulikov discovered that the CAP_SYS_MODULE capability was not needed to load kernel modules. A local attacker with the CAP_NET_ADMIN capability could load existing kernel modules, possibly increasing the attack surface available on the system. (CVE-2011-1019)

Nelson Elhage discovered that the epoll subsystem did not correctly handle certain structures. A local attacker could create malicious requests that would hang the system, leading to a denial of service. (CVE-2011-1082)

Nelson Elhage discovered that the epoll subsystem did not correctly handle certain structures. A local attacker could create malicious requests that would consume large amounts of CPU, leading to a denial of service. (CVE-2011-1083)

Julien Tinnes discovered that the kernel did not correctly validate the signal structure from tkill(). A local attacker could exploit this to send signals to arbitrary threads, possibly bypassing expected restrictions. (CVE-2011-1182)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 10.04 LTS:
linux-image-2.6.32-316-ec2 2.6.32-316.31
linux-image-2.6.32-32-386 2.6.32-32.62
linux-image-2.6.32-32-generic 2.6.32-32.62
linux-image-2.6.32-32-generic-pae 2.6.32-32.62
linux-image-2.6.32-32-ia64 2.6.32-32.62
linux-image-2.6.32-32-lpia 2.6.32-32.62
linux-image-2.6.32-32-powerpc 2.6.32-32.62
linux-image-2.6.32-32-powerpc-smp 2.6.32-32.62
linux-image-2.6.32-32-powerpc64-smp 2.6.32-32.62
linux-image-2.6.32-32-preempt 2.6.32-32.62
linux-image-2.6.32-32-server 2.6.32-32.62
linux-image-2.6.32-32-sparc64 2.6.32-32.62
linux-image-2.6.32-32-sparc64-smp 2.6.32-32.62
linux-image-2.6.32-32-versatile 2.6.32-32.62
linux-image-2.6.32-32-virtual 2.6.32-32.62

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.

References:
CVE-2010-4243, CVE-2010-4263, CVE-2010-4342, CVE-2010-4529,
CVE-2010-4565, CVE-2010-4656, CVE-2011-0463, CVE-2011-0521,
CVE-2011-0695, CVE-2011-0712, CVE-2011-0726, CVE-2011-1010,
CVE-2011-1012, CVE-2011-1013, CVE-2011-1016, CVE-2011-1019,
CVE-2011-1082, CVE-2011-1083, CVE-2011-1182

Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.32-32.62
https://launchpad.net/ubuntu/+source/linux-ec2/2.6.32-316.31