Rhapsody IRC 0.28b (NICK) Multiple fs and bof vulnerability

2007-03-18T00:00:00
ID SECURITYVULNS:DOC:16399
Type securityvulns
Reporter Securityvulns
Modified 2007-03-18T00:00:00

Description

Rhapsody IRC 0.28b (NICK) Multiple fs and bof vulnerability

Description:

Rhapsody is a text console IRC client for Unix operating systems. It is small, fast, portable, easy to use and full featured. An intuitive menu-driven user interface makes rhapsody ideal for beginner to intermediate users. Found buffer overflow in various functions. source: http://sourceforge.net/projects/rhapsody/

Source error:

define MAXDATASIZE 1024

char nick[MAXDATASIZE];

  • command request overflow

if (!sscanf(buffer, "/%s %[^\n]", command, parameters)){ return(E_NONE); }

  • "connect" and "server" request overflow

if (strcasecmp(command, "connect") == 0 || strcasecmp(command, "server") == 0){ pnum = sscanf(parameters, "%s %d", server, &port); if (pnum < 1){ vprint_all("Usage: /%s <server> [port]\n", command); return(E_OTHER); }

  • "nick" request overflow

else if (strcasecmp(command, "nick") == 0){ pnum = sscanf(parameters, "%s", nick); if (pnum < 1){ vprint_all("Usage: /nick <nick>\n"); } else{ sendcmd_server(currentserver, "NICK", nick, "", currentserver->nick); strcpy(currentserver->lastnick, currentserver->nick); strcpy(currentserver->nick, nick);

    }
    return&#40;E_OTHER&#41;;

}

  • "ctcp" request overflow

else if (strcasecmp(command, "ctcp") == 0){ if (sscanf(parameters, "%s %[^\n]", nick, message) == 2){ sendcmd_server(currentserver, "PRIVMSG", create_ctcp_message(message), nick, currentserver->nick); } else vprint_all("Usage: /ctcp <nick> <message>|<command>\n"); return(E_OTHER); }

  • "dcc chat/send" request overflow

if (strcasecmp(subcommand, "chat") == 0){ pnum = sscanf(subparameters, "%s %[^\n]", nick, message); if (pnum < 1){ vprint_all("Usage: /dcc chat <nick>\n"); return(E_OTHER); }

  • "notice" request overflow

else if (strcasecmp(command, "notice") == 0){ pnum = sscanf(parameters, "%s %[^\n]", nick, message); if (pnum < 2){ vprint_all("Usage: /%s <nick>|<channel> <message>\n", command); return(E_OTHER); } sendcmd_server(currentserver, "NOTICE", message, nick, currentserver->nick); return(E_OTHER); }

  • "msg" and "message" request overflow

else if (strcasecmp(command, "msg") == 0 || strcasecmp(command, "message") == 0){ pnum = sscanf(parameters, "%s %[^\n]", nick, message); if (pnum < 2){ vprint_all("Usage: /%s <nick> <message>\n", command); return(E_OTHER); } else if (strcmp(nick, currentserver->nick) == 0) print_all("You can not chat with yourself.\n"); else if (!currentserver->active) print_all("Must be connected to a server to chat.\n"); else { sendcmd_server(currentserver, "PRIVMSG", message, nick, currentserver->nick); return(E_OTHER); } }

  • "chat" and "query" request overflow

else if (strcasecmp(command, "chat") == 0 || strcasecmp(command, "query") == 0){ chat *C;

    pnum = sscanf&#40;parameters, &quot;&#37;s &#37;[^&#92;n]&quot;, nick, message&#41;;
    if &#40;pnum &lt; 1&#41;{
            vprint_all&#40;&quot;Usage: /&#37;s &lt;nick&gt; &lt;message&gt;&#92;n&quot;, command&#41;;
            return&#40;E_OTHER&#41;;
    }
  • "me" and "ctcp" request format string

comm.c: 472 char create_ctcp_message(char message, ...){ static char buffer[MAXDATASIZE]; va_list ap; char string[MAXDATASIZE];

    va_start&#40;ap, message&#41;;
    vsprintf&#40;string, message, ap&#41;;
    va_end&#40;ap&#41;;

    sprintf&#40;buffer, &quot;&#37;c&#37;s&#37;c&quot;, 1, string, 1&#41;;
    return&#40;buffer&#41;;

}

and other: whois, mode, topic..

-- .original http://intel.shacknet.nu/ ~ starcadi