irc_ctcp_get_reply (struct t_irc_server *server, const char *ctcp)
{
    struct t_config_option *ptr_option;
    char option_name[512];

    snprintf (option_name, sizeof (option_name), "%s.%s", server->name, ctcp);

    /* search for CTCP in configuration file, for server */
    ptr_option = weechat_config_search_option (irc_config_file,
                                               irc_config_section_ctcp,
                                               option_name);
    if (ptr_option)
        return weechat_config_string (ptr_option);

    /* search for CTCP in configuration file */
    ptr_option = weechat_config_search_option (irc_config_file,
                                               irc_config_section_ctcp,
                                               ctcp);
    if (ptr_option)
        return weechat_config_string (ptr_option);

    /*
     * no CTCP reply found in config, then return default reply, or NULL
     * for unknown CTCP
     */
    return irc_ctcp_get_default_reply (ctcp);
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.