Bug 1716990 (CVE-2019-12455)

Summary:	CVE-2019-12455 kernel: null pointer dereference in sunxi_divs_clk_setup in drivers/clk/sunxi/clk-sunxi.c causing denial of service
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, apmukher, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-02-20 16:29:26 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:	1717003
Bug Blocks:	1717002

Description Dhananjay Arunesh 2019-06-04 13:55:51 UTC

An issue was discovered in sunxi_divs_clk_setup in drivers/clk/sunxi/clk-sunxi.c
in the Linux kernel through 5.1.5. There is an unchecked kstrndup of
derived_name, which might allow an attacker to cause a denial of service (NULL
pointer dereference and system crash).

Reference:
https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2010240.html

Upstream commit:
https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux.git/commit/?h=sunxi/clk-for-5.3&id=fcdf445ff42f036d22178b49cf64e92d527c1330

Comment 1 Dhananjay Arunesh 2019-06-04 14:10:16 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1717003]