Bug 1590205 (CVE-2018-12233)

Summary:	CVE-2018-12233 kernel: Memory corruption in JFS setattr
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
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
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 memory corruption issue was found in the Linux kernel with a JFS file system. Two setxattr calls to the same file with different extended attribute names would trigger an overflow and a memory corruption.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-06-12 14:48:43 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:	1590206, 1590207
Bug Blocks:	1590208

Description Andrej Nemec 2018-06-12 08:30:00 UTC

A memory corruption issue was found in the Linux kernel with a JFS file system. Two setxattr calls to the same file with different extended attribute names would trigger an overflow and a memory corruption.

References:

https://lkml.org/lkml/2018/6/1/829

https://marc.info/?t=152788652700001&r=1&w=2

A proposed patch:

https://marc.info/?l=linux-kernel&m=152814391530549&w=2

Comment 1 Andrej Nemec 2018-06-12 08:31:05 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1590207]

Comment 5 Vladis Dronov 2018-06-12 14:48:43 UTC

Note:

Red Hat does not ship the JFS filesystem in any product, so no Red Hat products are vulnerable to this flaw.