Bug 1571062 (CVE-2018-8781)

Summary:	CVE-2018-8781 kernel: Integer overflow in drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() can allow attackers to execute code in kernel space
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	airlied, apmukher, aquini, bhu, blc, bskeggs, dhoward, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kbost, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, ltsai, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, slawomir, steved, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.16	Doc Type:	If docs needed, set a value
Doc Text:	A an integer overflow vulnerability was discovered in the Linux kernel, from version 3.4 through 4.15, in the drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() function. An attacker with access to the udldrmfb driver could exploit this to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:20:27 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:	1571063, 1573097, 1573098, 1573099, 1573100, 1573101, 1573102, 1573103, 1573104, 1725177, 1725178
Bug Blocks:	1571065

Description Sam Fowler 2018-04-24 03:43:30 UTC

The Linux kernel from version 3.4 through 4.15 has an integer overflow vulnerability in the drivers/gpu/drm/udl/udl_fb.c:udl_fb_mmap() function. An attacker with access to the udldrmfb driver could exploit this to obtain full read and write permissions on kernel physical pages, resulting in a code execution in kernel space.


Upstream Patch:

https://patchwork.freedesktop.org/patch/211845/

Mitre annoucement:


https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-8781

Comment 1 Sam Fowler 2018-04-24 03:44:34 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1571063]

Comment 2 Justin M. Forbes 2018-04-24 12:22:04 UTC

This was fixed for Fedora with the 4.15.14 stable kernel updates.

Comment 8 errata-xmlrpc 2018-10-30 07:33:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083

Comment 9 errata-xmlrpc 2018-10-30 07:39:04 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096

Comment 10 errata-xmlrpc 2018-10-30 09:00:16 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948