Bug 652122 – CVE-2010-3448 kernel: thinkpad-acpi: lock down video output state access

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Bug 652122 - (CVE-2010-3448) CVE-2010-3448 kernel: thinkpad-acpi: lock down video output state access

Summary:	CVE-2010-3448 kernel: thinkpad-acpi: lock down video output state access

Status:	CLOSED ERRATA

Aliases:	CVE-2010-3448

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	public=20100226,reported=20100622,sou...
Keywords:	Security

Depends On:	604608 607037 607038 607039 629241 652123
Blocks:
	Show dependency tree / graph

Reported:	2010-11-10 22:06 EST by Eugene Teo (Security Response)
Modified:	2015-07-31 08:26 EDT (History)
CC List:	2 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed:	2015-07-29 10:48:43 EDT
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Regression:	---
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RHEL 7.3 requirements from Atomic Host:
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Description Eugene Teo (Security Response) 2010-11-10 22:06:55 EST

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:
http://git.kernel.org/linus/b525c06cdbd8a3963f0173ccd23f9147d4c384b5

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