Several security issues were fixed in the kernel.
An information leak was discovered in the Linux kernel’s tkill and tgkill system calls when used from compat processes. A local user could exploit this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)
24 May 2013
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the kernel.
An information leak was discovered in the Linux kernel’s tkill and tgkill system calls when used from compat processes. A local user could exploit this flaw to examine potentially sensitive kernel memory. (CVE-2013-2141)
A flaw was discovered in the Linux kernel’s perf events subsystem for Intel Sandy Bridge and Ivy Bridge processors. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-2146)
An information leak was discovered in the Linux kernel’s crypto API. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3076)
An information leak was discovered in the Linux kernel’s rcvmsg path for ATM (Asynchronous Transfer Mode). A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3222)
An information leak was discovered in the Linux kernel’s recvmsg path for ax25 address family. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3223)
An information leak was discovered in the Linux kernel’s recvmsg path for the bluetooth address family. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3224)
An information leak was discovered in the Linux kernel’s bluetooth rfcomm protocol support. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3225)
An information leak was discovered in the Linux kernel’s bluetooth SCO sockets implementation. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3226)
An information leak was discovered in the Linux kernel’s CAIF protocol implementation. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3227)
An information leak was discovered in the Linux kernel’s IRDA (infrared) support subsystem. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3228)
An information leak was discovered in the Linux kernel’s s390 - z/VM support. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3229)
An information leak was discovered in the Linux kernel’s l2tp (Layer Two Tunneling Protocol) implementation. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3230)
An information leak was discovered in the Linux kernel’s llc (Logical Link Layer 2) support. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3231)
An information leak was discovered in the Linux kernel’s receive message handling for the netrom address family. A local user could exploit this flaw to obtain sensitive information from the kernel’s stack memory. (CVE-2013-3232)
An information leak was discovered in the Linux kernel’s nfc (near field communication) support. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3233)
An information leak was discovered in the Linux kernel’s Rose X.25 protocol layer. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3234)
An information leak was discovered in the Linux kernel’s TIPC (Transparent Inter Process Communication) protocol implementation. A local user could exploit this flaw to examine potentially sensitive information from the kernel’s stack memory. (CVE-2013-3235)
The problem can be corrected by updating your system to the following package versions:
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.
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