Bug 1027778 (CVE-2013-2930)

Summary:	CVE-2013-2930 kernel: perf/ftrace: insufficient check in perf_trace_event_perm()
Product:	[Other] Security Response	Reporter:	Petr Matousek <pmatouse>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	agordeev, anton, aquini, bhu, dhoward, esammons, fhrbata, iboverma, jkacur, jolsa, jross, kernel-mgr, lgoncalv, lwang, mcressma, npajkovs, pholasek, pmatouse, security-response-team, 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:	2014-01-28 18:29:30 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1027779, 1027781, 1027783
Bug Blocks:	1027789

Description Petr Matousek 2013-11-07 12:06:17 UTC

A flaw was found in the way perf_trace_event_perm() function in the Linux kernel checked permissions for function tracer functionality, allowing unprivileged local user to enable function tracing.

As a result, unprivileged local user could make the system unusable (DoS).

Introduced by:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ced39002f5ea

Fixed by:
http://git.kernel.org/cgit/linux/kernel/git/rostedt/linux-trace.git/commit/?h=ftrace/urgent&id=d1356abac98cce8e7765186f8093da1442d74d1d

Comment 4 Petr Matousek 2013-11-07 12:51:08 UTC

Statement:

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

Comment 5 Jarod Wilson 2013-12-05 14:09:18 UTC

Patch(es) available on kernel-3.10.0-58.el7

Comment 7 Jarod Wilson 2013-12-05 20:13:48 UTC

This is the tracking bug, not the RHEL7 bug, not quite sure how that didn't get caught at commit time. Fixing...

Comment 12 errata-xmlrpc 2014-01-28 17:40:46 UTC

This issue has been addressed in following products:

  MRG for RHEL-6 v.2

Via RHSA-2014:0100 https://rhn.redhat.com/errata/RHSA-2014-0100.html