Bug 1829841 (CVE-2020-0030)

Summary:	CVE-2020-0030 kernel: use after free due to a race condition in binder driver leads to local privilege escalation
Product:	[Other] Security Response	Reporter:	msiddiqu
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, ptalbert, qzhao, 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:	A race condition leading to a use-after-free memory flaw was found in the Linux kernel. This could lead to a local escalation of privileges with no additional execution privileges required. For this particular vulnerability, no user interaction is needed. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-30 13:25:30 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1829842
Bug Blocks:	1829843

Description msiddiqu 2020-04-30 13:12:51 UTC

A vulnerability was found in the Linux kernel. In binder_thread_release of binder.c, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

References:

https://source.android.com/security/bulletin/2020-02-01

Comment 1 msiddiqu 2020-04-30 13:13:36 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1829842]

Comment 2 msiddiqu 2020-04-30 13:19:24 UTC

Upstream commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5eeb2ca02a2f6084fc57ae5c244a38baab07033a

Comment 3 Eric Christensen 2020-05-01 18:04:47 UTC

External References:

https://source.android.com/security/bulletin/2020-02-01

Comment 4 Justin M. Forbes 2020-05-04 13:52:25 UTC

This was fixed for Fedora with the 4.14.22 stable kernel update.