Full Disclosure: Re: one of my servers has been compromized

[Valdis.Kletnieks () vt edu]

On Mon, 05 Dec 2011 19:04:02 +0100, Lucio Crusca said:

> Using dd on /dev/mem and piping results through netcat it's not that 
> difficult, and a bit of google explains how to do it the right way, but in 
> my case there are two other problems:
Note that the effectiveness and safety of doing a dd on /dev/mem is highly
dependent on kernel configuration and release.  See CONFIG_STRICT_DEVMEM
and CONFIG_DEVKMEM for details.  Also, some I/O hardware behaves strangely
or badly when you accidentally read from memory-mapped control registers (which
was one of the reasons for STRICT_DEVMEM being added).

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