========================================================================== Ubuntu Security Notice USN-1141-1 May 31, 2011 linux, linux-ec2 vulnerabilities ========================================================================== 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