Bug 1285326 (CVE-2015-7515)

Summary:	CVE-2015-7515 kernel: aiptek: crash on invalid USB device descriptors
Product:	[Other] Security Response	Reporter:	Vladis Dronov <vdronov>
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, itamar, jen, jforbes, jkacur, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, kstutsma, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, pholasek, plougher, rt-maint, rvrbovsk, slong, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	An out-of-bounds memory access flaw was found in the Linux kernel's aiptek USB tablet driver (aiptek_probe() function in drivers/input/tablet/aiptek.c). The driver assumed that the interface always had at least one endpoint. By using a specially crafted USB device with no endpoints on one of its interfaces, an unprivileged user with physical access to the system could trigger a kernel NULL pointer dereference, causing the system to panic.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-11-25 22:56:21 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:	1283350, 1285331
Bug Blocks:	1283654

Description Vladis Dronov 2015-11-25 12:00:05 UTC

An out-of-bounds memory access flaw was found in aiptek USB tablet driver in aiptek_probe() function in drivers/input/tablet/aiptek.c. The driver assumes that the interface always has at least one endpoint. By using a specially crafted USB device with no endpoints on one of its interfaces an unprivileged user with a physical access to the system can trigger a kernel NULL pointer dereference causing the system to panic.

Acknowledgements:

Red Hat would like to thank Ralf Spenneberg of OpenSource Security for reporting this issue.

References:

Proposed upstream patch: http://www.spinics.net/lists/linux-input/msg42294.html

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8e20cf2bce122ce9262d6034ee5d5b76fbb92f96

Comment 1 Vladis Dronov 2015-11-25 12:03:51 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1285331]

Comment 5 Vladis Dronov 2015-11-25 22:56:21 UTC

Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2, as the driver with the flaw is present in the products listed.

This has been rated as having Low security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Comment 6 Vladis Dronov 2015-11-25 23:11:32 UTC

References:

Proposed upstream patch: http://www.spinics.net/lists/linux-input/msg42294.html

Comment 7 Fedora Update System 2015-12-16 08:24:23 UTC

kernel-4.2.7-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2015-12-16 09:51:19 UTC

kernel-4.2.7-200.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.

Comment 9 Fedora Update System 2015-12-16 14:35:28 UTC

kernel-4.2.7-300.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.