Bug 1541876 (CVE-2017-16911)

Summary:	CVE-2017-16911 kernel: vhci_cd driver in usbip/vhci_sysfs.c:port_show_vhci() discloses kernel memory addresses to local attackers
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	airlied, ajax, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, steved, vdronov, williams, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	The usbip/vhci_sysfs.c:port_show_vhci() in the vhci_hcd driver of the Linux kernel, before version 4.14.8 and 4.4.114, allows local attackers to disclose kernel memory addresses. Successful exploitation requires that a USB device is attached over IP.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-02-16 12:38:46 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:	1541877
Bug Blocks:	1541878

Description Sam Fowler 2018-02-05 06:12:57 UTC

The usbip/vhci_sysfs.c:port_show_vhci() in the vhci_hcd driver of the Linux Kernel before version 4.14.8 and 4.4.114 allows local attackers to disclose kernel memory addresses. Successful exploitation requires that a USB device is attached over IP.

References:

https://secuniaresearch.flexerasoftware.com/secunia_research/2017-20/

https://www.spinics.net/lists/linux-usb/msg163477.html

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f2d0088eb93db5c649d2a5e34a3800a8a935fc5

Comment 1 Sam Fowler 2018-02-05 06:14:09 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1541877]

Comment 5 Eric Christensen 2018-02-19 16:20:48 UTC

Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, and 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE, as the code with the flaw is not enabled and is not built in the products listed.