Bug 1760550 (CVE-2019-15918)

Summary:	CVE-2019-15918 kernel: out-of-bounds read in fs/cifs/smb2pdu.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
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, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-12-10 02:32:26 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:	1760551
Bug Blocks:	1760552

Description Guilherme de Almeida Suckevicz 2019-10-10 19:32:39 UTC

An issue was discovered in the Linux kernel before 5.0.10. SMB2_negotiate in fs/cifs/smb2pdu.c has an out-of-bounds read because data structures are incompletely updated after a change from smb30 to smb21.

Reference:
https://github.com/torvalds/linux/commit/b57a55e2200ede754e4dc9cce4ba9402544b9365

Comment 1 Guilherme de Almeida Suckevicz 2019-10-10 19:32:57 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1760551]

Comment 2 Justin M. Forbes 2019-10-10 19:51:41 UTC

This was fixed for Fedora in the 5.0.10 stable kernel update.

Comment 3 Wade Mealing 2019-12-10 02:31:25 UTC

Statement:

At this time this flaw does not affect shipping releases of Red Hat Enterprise Linux kernels.