Re: Possible syslogd DoS ?

From: Petr Baudis (paskyat_private)
Date: Thu Oct 04 2001 - 04:48:52 PDT

  • Next message: Pavel Kankovsky: "Re: Possible syslogd DoS ?"

    > well that wouldnt work to well as syslog likes to do "message repeating X
    > number of times" , so trying to fill it up would prove boring and pointless.
    as i said those messages would be each different in order to prevent this.
    
    ..snip..
    > 
    > something as simple as that works, but for some reason when i run it on my
    > box it seems to exit after awhile even tho i capture all signal's maybe
    > syslog() has a exit() in the function , i cant be bothered looking into it,
    > i did this code on the fly for proof of concept
    didn't study the code, but at a glance it seems somewhat broken to me
    (buffer[strlen(buffer)-1]='\0'; looks very strange to me :)
    
    -- 
    
    				Petr "Pasky" Baudis
    .                                                                       .
            n = ((n >>  1) & 0x55555555) | ((n <<  1) & 0xaaaaaaaa);
            n = ((n >>  2) & 0x33333333) | ((n <<  2) & 0xcccccccc);
            n = ((n >>  4) & 0x0f0f0f0f) | ((n <<  4) & 0xf0f0f0f0);
            n = ((n >>  8) & 0x00ff00ff) | ((n <<  8) & 0xff00ff00);
            n = ((n >> 16) & 0x0000ffff) | ((n << 16) & 0xffff0000);
                    -- C code which reverses the bits in a word.
    .                                                                       .
    My public PGP key is on: http://pasky.ji.cz/~pasky/pubkey.txt
    -----BEGIN GEEK CODE BLOCK-----
    Version: 3.12
    GCS d- s++:++ a--- C+++ UL++++$ P+ L+++ E--- W+ N !o K- w-- !O M-
    !V PS+ !PE Y+ PGP+>++ t+ 5 X(+) R++ tv- b+ DI(+) D+ G e-> h! r% y?
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