Bug 607038 - kernel: thinkpad-acpi: lock down video output state access [mrg-1]
Summary: kernel: thinkpad-acpi: lock down video output state access [mrg-1]
Alias: None
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: realtime-kernel   
(Show other bugs)
Version: 1.2
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Red Hat Real Time Maintenance
QA Contact: David Sommerseth
Depends On: 607035 607039
Blocks: 607037 CVE-2010-3448
TreeView+ depends on / blocked
Reported: 2010-06-23 02:25 UTC by Eugene Teo (Security Response)
Modified: 2016-05-22 23:30 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 607035
Last Closed: 2010-07-08 19:53:34 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)

Description Eugene Teo (Security Response) 2010-06-23 02:25:42 UTC
+++ This bug was initially created as a clone of Bug #607035 +++

Description of problem:
Given the right combination of ThinkPad and X.org, just reading the video output control state is enough to hard-crash X.org.
Until the day I somehow find out a model or BIOS cut date to not provide this feature to ThinkPads that can do video switching through X RandR, change permissions so that only processes with CAP_SYS_ADMIN can access any sort of video output control state.
This bug could be considered a local DoS I suppose, as it allows any non-privledged local user to cause some versions of X.org to hard-crash some ThinkPads.
Reported-by: Jidanni <jidanni@jidanni.org>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: stable@kernel.org

Upstream commit:

Comment 3 Clark Williams 2010-07-08 19:53:34 UTC
Thinkpads are not target platforms for MRG RT.

Comment 4 Eugene Teo (Security Response) 2010-07-09 00:04:45 UTC
Thanks Clark.

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