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Re: [MISC] Teoretisk LinuxWindow-virus



On Thu, 29 Mar 2001, Claus Sørensen wrote:

> Er det muligt at udvikle en virus med følgende 
> karakteristika:
> 
> - Kan afvikles og spredes via Windows
> - Kan få skrive adgang til et vilkårligt katalog 
>   på et ext2-filsystem (f.eks. /bin/)

Ja, altså, hvis du har linux på nogen diske der sidder i en maskine der
også kører windows 9x.

Så vanskeligt er det heller ikke at søge et linux fil træ igennem på en
ext2 partition. Koden til at gøre det ligger jo i linux kernen, og kan vel
sagtens afvikles fra usermode Windows 9x.

> Hvis ovenstående er muligt, så kan man jo 
> overskrive f.eks. ping (der kører suid) med 
> en virusinficeret udgave af ping, som så kan 
> underminere resten af systemet.

Jep.

Den omvendte situation er også mulig, men vil typisk kræve at Linux
virusen kører som root. Tilsvarende med NT.

Kuren: Ingen windows på maskinen :-)

Mads

-- 
Mads Bondo Dydensborg.                               sslug@sslug
You know you're a Linux geek when...

    You feel an undefined sense of shame when the advice you give on
    Windows 9X works.

                                                     - segfault



 
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