Bug 456004

Summary:	Kernel : x86/msr: /dev/cpu/*/msr local privilege escalation (CVE-2013-0268)
Product:	Gentoo Security	Reporter:	Agostino Sarubbo <ago>
Component:	Kernel	Assignee:	Gentoo Kernel Security <security-kernel>
Status:	RESOLVED OBSOLETE
Severity:	normal	CC:	kernel
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://bugzilla.redhat.com/show_bug.cgi?id=908693
Whiteboard:
Package list:		Runtime testing required:	---

Description Agostino Sarubbo gentoo-dev

2013-02-07 12:36:22 UTC

From $URL :

Access to /dev/cpu/*/msr was protected only using filesystem checks. A local uid 0 (root) user with 
all capabilities dropped could use this flaw to execute arbitrary code in kernel mode.

Upstream commit:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=c903f0456bc69176912dee6dd25c6a66ee1aed00

References:
http://grsecurity.net/~spender/msr32.c

Comment 1 Aaron Bauman (RETIRED) gentoo-dev

2018-04-04 18:28:31 UTC

There are no longer any 2.x kernels available in the repository with the exception of sys-kernel/xbox-sources which is unsupported by security.