Advisory Published

USN-1778-1: Linux kernel (OMAP4) vulnerabilities

First published: Fri Mar 22 2013(Updated: )

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-3.0.0-1222-omap4<3.0.0-1222.36
3.0.0-1222.36
Ubuntu gir1.2-packagekitglib-1.0=11.10

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-1778-1?

    USN-1778-1 is classified with a severity level that allows unprivileged guest OS users to exploit the system, potentially causing denial of service.

  • How do I fix USN-1778-1?

    To fix USN-1778-1, upgrade to the fixed package version 3.0.0-1222.36 of linux-image-3.0.0-1222-omap4.

  • What causes the vulnerability described in USN-1778-1?

    The vulnerability in USN-1778-1 is caused by a flaw in the xen_iret function in the Linux kernel's Xen virtualization for the 32-bit paravirt platform.

  • Who discovered the vulnerability USN-1778-1?

    The vulnerability USN-1778-1 was discovered by Andrew Jones.

  • What are the potential impacts of USN-1778-1?

    The impacts of USN-1778-1 include the potential for a denial of service or gaining privileges within the guest OS.

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