Bug 998878 (CVE-2013-4254)

Summary:	CVE-2013-4254 Kernel: ARM: perf: NULL pointer dereference in validate_event
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	agordeev, anton, aquini, bhu, davej, dhoward, esammons, fhrbata, gansalmon, iboverma, itamar, jforbes, jkacur, jkurik, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, lgoncalv, lwang, madhu.chinakonda, marcelo.barbosa, matt, mcressma, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-10 06:52:23 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	998881
Bug Blocks:	998854

Description Prasad Pandit 2013-08-20 09:34:20 UTC

Linux kernel built for the ARM(CONFIG_ARM/CONFIG_ARM64) platforms along with the
hardware performance counter support(CONFIG_HW_PERF_EVENTS) is vulnerable to a
NULL pointer dereference flaw. This could lead to the kernel crash resulting in
DoS or potential privilege escalation to gain root privileges by a non-root user.

An unprivileged user/program could use this flaw to crash the kernel resulting
in DoS or potential privilege escalation to gain root access to a machine.

Upstream fix:
-------------
 -> https://lkml.org/lkml/2013/8/7/259

Reference:
----------
 -> http://seclists.org/oss-sec/2013/q3/381

Comment 1 Prasad Pandit 2013-08-20 09:37:08 UTC

Statement:

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

Comment 2 Prasad Pandit 2013-08-20 09:43:31 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 998881]

Comment 3 Josh Boyer 2013-08-20 12:08:12 UTC

A better pointer to the fix is probably this:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/arch/arm/kernel/perf_event.c?id=c95eb3184ea1a3a2551df57190c81da695e2144b

Comment 4 Fedora Update System 2013-08-23 00:31:57 UTC

kernel-3.10.9-100.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2013-08-23 00:44:09 UTC

kernel-3.10.9-200.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.