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rhapsody-irc.txt

Posted on 20 March 2007
Source : packetstormsecurity.org Link

 

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 %[^
]", 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]
", 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>
");
}
else{
sendcmd_server(currentserver, "NICK", nick, "", currentserver->nick);
strcpy(currentserver->lastnick, currentserver->nick);
strcpy(currentserver->nick, nick);

}
return(E_OTHER);
}

- "ctcp" request overflow

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

- "dcc chat/send" request overflow

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

- "notice" request overflow

else if (strcasecmp(command, "notice") == 0){
pnum = sscanf(parameters, "%s %[^
]", nick, message);
if (pnum < 2){
vprint_all("Usage: /%s <nick>|<channel> <message>
", 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 %[^
]", nick, message);
if (pnum < 2){
vprint_all("Usage: /%s <nick> <message>
", command);
return(E_OTHER);
}
else if (strcmp(nick, currentserver->nick) == 0) print_all("You can
not chat with yourself.
");
else if (!currentserver->active) print_all("Must be connected to a
server to chat.
");
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(parameters, "%s %[^
]", nick, message);
if (pnum < 1){
vprint_all("Usage: /%s <nick> <message>
", command);
return(E_OTHER);
}

- "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(ap, message);
vsprintf(string, message, ap);
va_end(ap);

sprintf(buffer, "%c%s%c", 1, string, 1);
return(buffer);
}

and other: whois, mode, topic..

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