Bug 1573699 (CVE-2018-1118)

Summary:	CVE-2018-1118 kernel: vhost: Information disclosure in vhost/vhost.c:vhost_new_msg()
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
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, security-response-team, skozina, steved, vdronov, williams, wmealing
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Kernel 6.4-rc6	Doc Type:	If docs needed, set a value
Doc Text:	The Linux kernel does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This can allow local privileged users to read some kernel memory contents when reading from the /dev/vhost-net device file.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 10:21:01 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:	1573705, 1573706, 1573707, 1576186, 1576187, 1576811
Bug Blocks:	1572782

Description Sam Fowler 2018-05-02 05:00:25 UTC

The Linux kernel does not properly initialize memory in messages passed between virtual guests and the host operating system in the vhost/vhost.c:vhost_new_msg() function. This can allow local privileged users to read some kernel memory contents when reading from  the /dev/vhost-net device file.

References:

https://lkml.org/lkml/2018/4/27/833

https://marc.info/?t=152484394400005&r=1&w=2 (and the next pages)

Comment 5 Wade Mealing 2018-05-09 05:20:36 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1576187]

Comment 9 Justin M. Forbes 2018-07-16 14:24:15 UTC

This was fixed for Fedora with the 4.17 rebases.

Comment 10 errata-xmlrpc 2018-10-30 07:33:09 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 11 errata-xmlrpc 2018-10-30 07:39:21 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 12 errata-xmlrpc 2018-10-30 09:00:47 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