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CVE-2012-2934

Status Candidate

Overview

Xen 4.0, and 4.1, when running a 64-bit PV guest on "older" AMD CPUs, does not properly protect against a certain AMD processor bug, which allows local guest OS users to cause a denial of service (host hang) via sequential execution of instructions across a non-canonical boundary, a different vulnerability than CVE-2012-0217.

Related Files

Gentoo Linux Security Advisory 201309-24
Posted Sep 27, 2013
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201309-24 - Multiple vulnerabilities have been found in Xen, allowing attackers on a Xen Virtual Machine to execute arbitrary code, cause Denial of Service, or gain access to data on the host. Versions less than 4.2.2-r1 are affected.

tags | advisory, denial of service, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2011-2901, CVE-2011-3262, CVE-2011-3262, CVE-2012-0217, CVE-2012-0218, CVE-2012-2934, CVE-2012-3432, CVE-2012-3433, CVE-2012-3494, CVE-2012-3495, CVE-2012-3496, CVE-2012-3497, CVE-2012-3498, CVE-2012-3515, CVE-2012-4411, CVE-2012-4535, CVE-2012-4536, CVE-2012-4537, CVE-2012-4538, CVE-2012-4539, CVE-2012-5510, CVE-2012-5511, CVE-2012-5512, CVE-2012-5513, CVE-2012-5514, CVE-2012-5515, CVE-2012-5525, CVE-2012-5634
SHA-256 | 42fbd346dc4e79100c814835fd5068ef0a6bd2ccc23977307e7f191f8be1cc22
Debian Security Advisory 2501-1
Posted Jun 24, 2012
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2501-1 - Several vulnerabilities were discovered in Xen, a hypervisor.

tags | advisory, vulnerability
systems | linux, debian
advisories | CVE-2012-0217, CVE-2012-0218, CVE-2012-2934
SHA-256 | aedc2dcb40c8f0ac3825bb16ea9ed2fab49038c45013687c7f01466444984580
Red Hat Security Advisory 2012-0721-01
Posted Jun 12, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0721-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. It was found that the Xen hypervisor implementation as shipped with Red Hat Enterprise Linux 5 did not properly restrict the syscall return addresses in the sysret return path to canonical addresses. An unprivileged user in a 64-bit para-virtualized guest, that is running on a 64-bit host that has an Intel CPU, could use this flaw to crash the host or, potentially, escalate their privileges, allowing them to execute arbitrary code at the hypervisor level.

tags | advisory, arbitrary, kernel
systems | linux, redhat
advisories | CVE-2012-0217, CVE-2012-2934
SHA-256 | a5b7f699084429bb0df03f79e3c77c3fe4d64db427a8e5ac1c2e51801bd8f6fe
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