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A comment on Energizer battery charger contains backdoor. Parent comment

Re:Energizer battery charger contains backdoor by wendroid on Tuesday March 09, 2010 @07:54AM (#1178088)
man dma
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Re:Energizer battery charger contains backdoor by masomenos on Tuesday March 09, 2010 @10:01AM (#1178367) 

  $ man dma
  No manual entry for dma
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Re:Energizer battery charger contains backdoor by wendroid on Tuesday March 09, 2010 @12:31PM (#1178851)
http://en.wikipedia.org/wiki/Direct_memory_access

And the description of how to exploit it

http://www.schneier.com/blog/archives/2006/06/hacking_comput...

The FireWire version http://www.storm.net.nz/static/files/ab_firewire_rux2k6-fina...

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Re:Energizer battery charger contains backdoor by wendroid on Tuesday March 09, 2010 @10:14AM (#1178398)
get a better manual
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Re:Energizer battery charger contains backdoor by jey on Tuesday March 09, 2010 @03:50PM (#1179328)
Er, DMA isn't controlled by the TLB using the usual page table for access permissions? If not, PCs are ridiculously broken.
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Re:Energizer battery charger contains backdoor by wendroid on Thursday March 11, 2010 @01:01PM (#1184393)
You can read write system memory at addresses that fit in 32bits even when the Kernel has crashed.
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