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Bug 248710 - Local keyboard DoS through LED switching
Local keyboard DoS through LED switching
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
low Severity low
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Assigned To: Red Hat Product Security
Depends On: 461232 461233 461239 461240
  Show dependency treegraph
Reported: 2007-07-18 08:40 EDT by Marcel Holtmann
Modified: 2011-09-28 13:14 EDT (History)
7 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2011-09-28 13:14:18 EDT
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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

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

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

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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