Bug 1624507 (CVE-2018-16276)

Summary:	CVE-2018-16276 kernel: incorrect bounds checking in yurex_read in drivers/usb/misc/yurex.c
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, airlied, aquini, bhu, blc, bskeggs, dbaker, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jokerman, jonathan, josef, jross, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, sfowler, skozina, steved, sthangav, trankin, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.17.7	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds access issue was discovered in yurex_read() in drivers/usb/misc/yurex.c in the Linux kernel. A local attacker could use user access read/writes with incorrect bounds checking in the yurex USB driver to crash the kernel or potentially escalate privileges.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-03 15:05:58 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:	1624508
Bug Blocks:	1624509, 1651063

Description Laura Pardo 2018-08-31 20:58:15 UTC

An out-of-bound access issue was discovered in yurex_read() in drivers/usb/misc/yurex.c in the Linux kernel. A local attacker could use user access read/writes with incorrect bounds checking in the yurex USB driver to crash the kernel or potentially escalate privileges.

References:

https://marc.info/?t=153089016500001&r=1&w=2

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.7

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f1e255d60ae66a9f672ff9a207ee6cd8e33d2679

Comment 1 Laura Pardo 2018-08-31 20:58:43 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1624508]

Comment 2 Justin M. Forbes 2018-08-31 21:26:35 UTC

This was fixed for Fedora with the 4.17.7 stable updates.

Comment 5 Vladis Dronov 2018-09-03 15:05:58 UTC

Note:

No Red Hat products are vulnerable to this flaw, as the yurex driver is not shipped.

Comment 6 Joshua Padman 2018-11-26 03:32:02 UTC

*** Bug 1651061 has been marked as a duplicate of this bug. ***