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Overthewire Vortex Level1

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Ok, Level1 fand ich jetzt schon kniffliger....
 
Stichwort: Buffer Underwrite ('Buffer Underflow') - http://cwe.mitre.org/data/definitions/124.html
 
Ein paar "printf" machen die Sache etwas deutlicher:
 
printf("Anfang buf: %x\n", (unsigned int)buf);
printf("Ende buf: %x\n",((unsigned int)buf + sizeof(buf)));
printf("ptr: %x\n",&ptr);

Anfang buf: bffff460
Ende buf: bffff660
ptr: bffff45c
 
Hiermeine Lösung
Continue reading "Overthewire Vortex Level1"

Overthewire Vortex Level0

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Mit http://www.overthewire.org/ scheint es (eine weitere) interessante Seite, mit sogenannten Wargames zu geben.
 
"The wargames offered by the OverTheWire community can help you to learn and practice security concepts in the form of funfilled games" (http://www.overthewire.org)
 
Na dann mal los......;D
 
Hier meine Lösung für Level0
Continue reading "Overthewire Vortex Level0"
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