Bug 248710 – Local keyboard DoS through LED switching

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Bug 248710 - Local keyboard DoS through LED switching

Summary:	Local keyboard DoS through LED switching

Status:	CLOSED ERRATA

Aliases:	None

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

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,source=redhat,reported=200...
Keywords:

Depends On:	461232 461233 461239 461240
Blocks:
	Show dependency tree / graph

Reported:	2007-07-18 08:40 EDT by Marcel Holtmann
Modified:	2011-09-28 13:14 EDT (History)
CC List:	7 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2011-09-28 13:14:18 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Upstream patch for this issue (3.27 KB, patch) 2008-09-05 04:49 EDT, Eugene Teo (Security Response)	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2008:1017	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2008-12-16 02:33:56 EST
Red Hat Product Errata	RHSA-2009:0014	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2009-01-14 13:05:34 EST

Groups: None (edit)

Description Marcel Holtmann 2007-07-18 08:40:16 EDT

On some boxes keyboard controllers are too slow to withstand continuous flow of
requests to turn keyboard LEDs on and off and start losing some keypresses or
even all of them. This causes a local denial of service situation.

Comment 4 Eugene Teo (Security Response) 2008-09-05 04:45:24 EDT

Proposed upstream patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=da4249c99fd59c4e224e4f9acaf07669d205bb1d;hp=9d9d50bb2efb50594abfc3941a5504b62c514ebd

Comment 5 Eugene Teo (Security Response) 2008-09-05 04:49:03 EDT

Created attachment 315849 [details]
Upstream patch for this issue

Comment 6 Eugene Teo (Security Response) 2008-09-05 05:01:23 EDT

Reproducer:
while true; do setleds +num; setleds -num; done

http://lkml.org/lkml/2007/6/15/22

Comment 13 Kurt Seifried 2011-09-28 13:14:18 EDT

This issue has been addressed in following products:

  Red Hat Linux Enterprise 4
  Red Hat Linux Enterprise 4.7.z
  Red Hat Linux Enterprise 5

Via RHSA-2009-0014 available at https://rhn.redhat.com/errata/RHSA-2009-0014.html and RHSA-2008:1017 available at https://rhn.redhat.com/errata/RHSA-2008-1017.html

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