irc_ctcp_display_reply_from_nick (struct t_irc_server *server, time_t date,
                                  const char *command, const char *nick,
                                  const char *address, char *arguments)
{
    char *pos_end, *pos_space, *pos_args, *pos_usec;
    struct timeval tv;
    long sec1, usec1, sec2, usec2, difftime;

    while (arguments && arguments[0])
    {
        pos_end = strrchr (arguments + 1, '\01');
        if (pos_end)
            pos_end[0] = '\0';

        pos_space = strchr (arguments + 1, ' ');
        if (pos_space)
        {
            pos_space[0] = '\0';
            pos_args = pos_space + 1;
            while (pos_args[0] == ' ')
            {
                pos_args++;
            }
            if (strcmp (arguments + 1, "PING") == 0)
            {
                pos_usec = strchr (pos_args, ' ');
                if (pos_usec)
                {
                    pos_usec[0] = '\0';

                    gettimeofday (&tv, NULL);
                    sec1 = atol (pos_args);
                    usec1 = atol (pos_usec + 1);
                    sec2 = tv.tv_sec;
                    usec2 = tv.tv_usec;

                    difftime = ((sec2 * 1000000) + usec2) -
                        ((sec1 * 1000000) + usec1);
                    weechat_printf_date_tags (
                        irc_msgbuffer_get_target_buffer (
                            server, nick, NULL, "ctcp", NULL),
                        date,
                        irc_protocol_tags (command, "irc_ctcp", NULL, NULL),
                        /* TRANSLATORS: %.3fs is a float number + "s" ("seconds") */
                        _("%sCTCP reply from %s%s%s: %s%s%s %.3fs"),
                        weechat_prefix ("network"),
                        irc_nick_color_for_msg (server, 0, NULL, nick),
                        nick,
                        IRC_COLOR_RESET,
                        IRC_COLOR_CHAT_CHANNEL,
                        arguments + 1,
                        IRC_COLOR_RESET,
                        (float)difftime / 1000000.0);

                    pos_usec[0] = ' ';
                }
            }
            else
            {
                weechat_printf_date_tags (
                    irc_msgbuffer_get_target_buffer (
                        server, nick, NULL, "ctcp", NULL),
                    date,
                    irc_protocol_tags (command, "irc_ctcp", NULL, address),
                    _("%sCTCP reply from %s%s%s: %s%s%s%s%s"),
                    weechat_prefix ("network"),
                    irc_nick_color_for_msg (server, 0, NULL, nick),
                    nick,
                    IRC_COLOR_RESET,
                    IRC_COLOR_CHAT_CHANNEL,
                    arguments + 1,
                    IRC_COLOR_RESET,
                    " ",
                    pos_args);
            }
            pos_space[0] = ' ';
        }
        else
        {
            weechat_printf_date_tags (
                irc_msgbuffer_get_target_buffer (
                    server, nick, NULL, "ctcp", NULL),
                date,
                irc_protocol_tags (command, NULL, NULL, address),
                _("%sCTCP reply from %s%s%s: %s%s%s%s%s"),
                weechat_prefix ("network"),
                irc_nick_color_for_msg (server, 0, NULL, nick),
                nick,
                IRC_COLOR_RESET,
                IRC_COLOR_CHAT_CHANNEL,
                arguments + 1,
                "",
                "",
                "");
        }

        if (pos_end)
            pos_end[0] = '\01';

        arguments = (pos_end) ? pos_end + 1 : NULL;
    }
}

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.