Bug 1404655 (CVE-2015-8964)

Summary:	CVE-2015-8964 kernel: tty: Prevent ldisc drivers from re-using stale tty fields
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, ichavero, itamar, jforbes, jkacur, jkastner, joelsmith, jonathan, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, lwang, madhu.chinakonda, matt, mchehab, mcressma, mguzik, nmurray, pholasek, plougher, rt-maint, rvrbovsk, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:	The tty_set_termios_ldisc() function in 'drivers/tty/tty_ldisc.c' in the Linux kernel before 4.5 allows local users to obtain sensitive information from kernel memory by reading a tty data structure.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-12-14 11:25:47 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:
Bug Blocks:	1395269

Description Vladis Dronov 2016-12-14 11:21:53 UTC

The tty_set_termios_ldisc() function in 'drivers/tty/tty_ldisc.c' in the Linux kernel before 4.5 allows local users to obtain sensitive information from kernel memory by reading a tty data structure.

References:

http://source.android.com/security/bulletin/2016-11-01.html

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-8964

An Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=dd42bf1197144ede075a9d4793123f7689e164bc

Comment 3 Vladis Dronov 2016-12-14 11:25:47 UTC

Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2. 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/.