Bug 1582346 (CVE-2018-10840)

Summary:	CVE-2018-10840 kernel: Heap-based buffer overflow in fs/ext4/xattr.c:ext4_xattr_set_entry() with crafted ext4 image
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	airlied, aquini, bhu, blc, bskeggs, dhoward, 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, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, slawomir, steved, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	The Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:26:32 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:	1582347, 1582348, 1584985, 1584986, 1584987, 1584988, 1584989, 1584990
Bug Blocks:	1582351

Description Sam Fowler 2018-05-25 00:40:54 UTC

The Linux kernel is vulnerable to a heap-based buffer overflow in the fs/ext4/xattr.c:ext4_xattr_set_entry() function. An attacker could exploit this by operating on a mounted crafted ext4 image.


Upstream bug:

https://bugzilla.kernel.org/show_bug.cgi?id=199347


Upstream patch:

https://bugzilla.kernel.org/attachment.cgi?id=276147&action=diff

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8a2b307c21d4b290e3cbe33f768f194286d07c23

Comment 1 Sam Fowler 2018-05-25 00:42:16 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1582348]

Comment 6 errata-xmlrpc 2019-01-29 18:30:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:0162 https://access.redhat.com/errata/RHSA-2019:0162