Several security issues were fixed in the kernel.
Mathias Krause discovered an information leak in the Linux kernel’s UDF file system implementation. A local user could exploit this flaw to examine some of the kernel’s heap memory. (CVE-2012-6548)
2 May 2013
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in the kernel.
Mathias Krause discovered an information leak in the Linux kernel’s UDF file system implementation. A local user could exploit this flaw to examine some of the kernel’s heap memory. (CVE-2012-6548)
Mathias Krause discovered an information leak in the Linux kernel’s ISO 9660 CDROM file system driver. A local user could exploit this flaw to examine some of the kernel’s heap memory. (CVE-2012-6549)
An integer overflow was discovered in the Direct Rendering Manager (DRM) subsystem for the i915 video driver in the Linux kernel. A local user could exploit this flaw to cause a denial of service (crash) or potentially escalate privileges. (CVE-2013-0913)
Andrew Honig discovered a flaw in guest OS time updates in the Linux kernel’s KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to cause a denial of service (crash host system) or potential escalate privilege to the host kernel level. (CVE-2013-1796)
Andrew Honig discovered a use after free error in guest OS time updates in the Linux kernel’s KVM (Kernel-based Virtual Machine). A privileged guest user could exploit this flaw to escalate privilege to the host kernel level. (CVE-2013-1797)
Andrew Honig reported a flaw in the way KVM (Kernel-based Virtual Machine) emulated the IOAPIC. A privileged guest user could exploit this flaw to read host memory or cause a denial of service (crash the host). (CVE-2013-1798)
A format-string bug was discovered in the Linux kernel’s ext3 filesystem driver. A local user could exploit this flaw to possibly escalate privileges on the system. (CVE-2013-1848)
A buffer overflow was discovered in the Linux Kernel’s USB subsystem for devices reporting the cdc-wdm class. A specially crafted USB device when plugged-in could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2013-1860)
A flaw was discovered in the SCTP (stream control transfer protocol) network protocol’s handling of duplicate cookies in the Linux kernel. A remote attacker could exploit this flaw to cause a denial of service (system crash) on another remote user querying the SCTP connection. (CVE-2013-2206)
An information leak in the Linux kernel’s dcb netlink interface was discovered. A local user could obtain sensitive information by examining kernel stack memory. (CVE-2013-2634)
A kernel stack information leak was discovered in the RTNETLINK component of the Linux kernel. A local user could read sensitive information from the kernel stack. (CVE-2013-2635)
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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