Advisory Published

USN-1756-1: Linux kernel vulnerabilities

First published: Wed Mar 06 2013(Updated: )

A failure to validate input was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS may exploit this flaw to cause a denial of service to the guest OS and other guest domains. (CVE-2013-0216) A memory leak was discovered in the Linux kernel's Xen netback (network backend) driver. A user in a guest OS could trigger this flaw to cause a denial of service on the system. (CVE-2013-0217) Andrew Jones discovered a flaw with the xen_iret function in Linux kernel's Xen virtualizeation. In the 32-bit Xen paravirt platform an unprivileged guest OS user could exploit this flaw to cause a denial of service (crash the system) or gain guest OS privilege. (CVE-2013-0228) A flaw was reported in the permission checks done by the Linux kernel for /dev/cpu/*/msr. A local root user with all capabilities dropped could exploit this flaw to execute code with full root capabilities. (CVE-2013-0268) A flaw was discovered in the Linux kernel's vhost driver used to accelerate guest networking in KVM based virtual machines. A privileged guest user could exploit this flaw to crash the host system. (CVE-2013-0311) An information leak was discovered in the Linux kernel's Bluetooth stack when HIDP (Human Interface Device Protocol) support is enabled. A local unprivileged user could exploit this flaw to cause an information leak from the kernel. (CVE-2013-0349) A flaw was discovered on the Linux kernel's VFAT filesystem driver when a disk is mounted with the utf8 option (this is the default on Ubuntu). On a system where disks/images can be auto-mounted or a FAT filesystem is mounted an unprivileged user can exploit the flaw to gain root privileges. (CVE-2013-1773)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-3.0.0-32-powerpc64-smp<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-omap<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-generic<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-server<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-powerpc-smp<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-virtual<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-powerpc<3.0.0-32.50
3.0.0-32.50
=11.10
All of
ubuntu/linux-image-3.0.0-32-generic-pae<3.0.0-32.50
3.0.0-32.50
=11.10

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