Bug 1595835 (CVE-2018-12714)

Summary:	CVE-2018-12714 kernel: slab out-of-bounds write in trace/trace_events_filter.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	airlied, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.18-rc2	Doc Type:	If docs needed, set a value
Doc Text:	An issue was discovered in the Linux kernel in the filter parsing code in kernel/trace/trace_events_filter.c. The code could be called with no filter when it expected at least one, which allows attackers to cause a slab out-of-bounds write and so a denial of service via crafted perf_event_open and mmap system calls.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-07-09 16:06:28 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:	1595836, 1595837
Bug Blocks:	1595838

Description Laura Pardo 2018-06-27 15:05:55 UTC

An issue was discovered in the Linux kernel in the filter parsing code in kernel/trace/trace_events_filter.c. The code could be called with no filter, when it expected at least one. This allows attackers to cause a slab out-of-bounds write and so a denial of service via crafted perf_event_open and mmap system calls.

References:

https://bugzilla.kernel.org/show_bug.cgi?id=200019 	

https://marc.info/?l=linux-kernel&m=152973006431221&w=2

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=70303420b5721c38998cf987e6b7d30cc62d4ff1

Comment 1 Laura Pardo 2018-06-27 15:07:02 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1595837]