Bug 1377330 (CVE-2016-7425)

Summary:	CVE-2016-7425 kernel: SCSI arcmsr driver: Buffer overflow in arcmsr_iop_message_xfer()
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	agordeev, aquini, arm-mgr, bhu, dhoward, esammons, fhrbata, gansalmon, iboverma, ichavero, itamar, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, plougher, rt-maint, rvrbovsk, slawomir, vdronov, williams
Target Milestone:	---	Keywords:	Reopened, Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	A heap-buffer overflow vulnerability was found in the arcmsr_iop_message_xfer() function in 'drivers/scsi/arcmsr/arcmsr_hba.c' file in the Linux kernel through 4.8.2. The function does not restrict a certain length field, which allows local users to gain privileges or cause a denial of service via an ARCMSR_MESSAGE_WRITE_WQBUFFER control code. This can potentially cause kernel heap corruption and arbitrary kernel code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-10-25 13:40:18 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:	1377331, 1381976, 1381977, 1381978, 1381979, 1381980, 1381982, 1381983, 1381984
Bug Blocks:	1377333

Description Andrej Nemec 2016-09-19 12:59:59 UTC

A heap-buffer overflow vulnerability was found in the arcmsr_iop_message_xfer() function in 'drivers/scsi/arcmsr/arcmsr_hba.c' file in the Linux kernel through 4.8.2. The function does not restrict a certain length field, which allows local users to gain privileges or cause a denial of service via an ARCMSR_MESSAGE_WRITE_WQBUFFER control code. This can potentially cause kernel heap corruption and arbitrary kernel code execution.

Upstream patch:

http://marc.info/?l=linux-scsi&m=147394713328707&w=2

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7bc2b55a5c030685b399bb65b6baa9ccc3d1f167

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4bd173c30792791a6daca8c64793ec0a4ae8324f

Discussion thread:

http://marc.info/?t=147394719700004&r=1&w=2

References:

http://seclists.org/oss-sec/2016/q3/535

Comment 1 Andrej Nemec 2016-09-19 13:01:01 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1377331]

Comment 2 Fedora Update System 2016-09-28 05:57:24 UTC

kernel-4.7.5-200.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-7179af3ac1

Comment 3 Fedora Update System 2016-09-28 06:25:36 UTC

kernel-4.7.5-100.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-58eda97f25

Comment 4 Fedora Update System 2016-10-01 00:52:23 UTC

kernel-4.7.5-200.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2016-10-01 04:20:28 UTC

kernel-4.7.5-100.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 12 Vladis Dronov 2016-10-06 14:58:27 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. 6, 7 and Red Hat Enterprise MRG-2 as only the privileged user can exploit the flaw.