Bug 652122 (CVE-2010-3448)

Summary: CVE-2010-3448 kernel: thinkpad-acpi: lock down video output state access
Product: [Other] Security Response Reporter: Eugene Teo (Security Response) <eteo>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: kernel-mgr, vkrizan
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: public=20100226,reported=20100622,source=internet,impact=moderate,cvss2=4/AV:L/AC:H/Au:N/C:N/I:N/A:C,rhel-5/kernel=affected,rhel-6/kernel=affected,mrg-1/realtime-kernel=affected
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2015-07-29 10:48:43 EDT Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Bug Depends On: 604608, 607037, 607038, 607039, 629241, 652123    
Bug Blocks:    

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