Bug 1735637 (CVE-2017-18379)

Summary:	CVE-2017-18379 kernel: out of bound access in drivers/nvme/target/fc.c
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, nyewale, plougher, rt-maint, rvrbovsk, steved, williams, wmealing, 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:	A flaw was found in the Linux kernel’s implementation of NVME over a fiber connection. A local attacker could use this flaw to create a situation in which specially crafted requests could corrupt memory or possibly escalate privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-08-15 20:47:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1735639
Bug Blocks:	1735640

Description Dhananjay Arunesh 2019-08-01 07:52:34 UTC

A flaw was found in the linux kernels implementation of NVME over fiber connection.  A local attacker is able to create a situation in which speciacally crafted reqeusts could return kernel memory as inflight data or possibly corrupt kernel memory.

This may allow a local attacker to panic the system or escalate privileges.

Reference:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0c319d3a144d4b8f1ea2047fd614d2149b68f889
https://github.com/torvalds/linux/commit/0c319d3a144d4b8f1ea2047fd614d2149b68f889

Comment 1 Dhananjay Arunesh 2019-08-01 07:54:42 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1735639]

Comment 2 Justin M. Forbes 2019-08-01 12:39:27 UTC

This was fixed for Fedora in 4.14 and never impacted any currently supported Fedora releases.

Comment 4 Wade Mealing 2019-08-05 07:49:20 UTC

This flaw is rated as Important, it may allow a local attacker to issue an out-of-bounds write and gather information that is not intended to be accessed.  This information may weaken security measures in place making it easier for subsequent attacks to succeed.

Note: No current shipping versions of Red Hat Enterprise Linux are affected either by having the fix that solves that problem or not including the code that introduced the problem.

Comment 6 Product Security DevOps Team 2019-08-15 20:47:03 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2017-18379