Nmap Development mailing list archives
Illegal character in hostname
From: Gisle Vanem <gvanem () broadpark no>
Date: Sat, 07 Jan 2012 20:30:23 +0100
I found that nmap doesn't like IP-addresses that simply resolves to a dot '.'. E.g. 77.247.181.164 -> '.'.
nmap spews out a lot of these lines when encountering such a name: Illegal character(s) in hostname -- replacing with '*' Illegal character(s) in hostname -- replacing with '*' Illegal character(s) in hostname -- replacing with '*' Illegal character(s) in hostname -- replacing with '*' Illegal character(s) in hostname -- replacing with '* ... I think the function encoded_name_to_normal() in nmap_dns.cc doesn't handle such "joke hostname"; it's stepping out-of-bounds. A patch that works for me: @@ -601,6 +602,13 @@ // a normal decimal separated hostname. // ASSUMES NAME LENGTH/VALIDITY HAS ALREADY BEEN VERIFIED static int encoded_name_to_normal(unsigned char *buf, char *output, int outputsize){ + + if (!buf[0]) { + *output++ = '.'; + *output++ = '\0'; + return 0; + } + while (buf[0]) { if (buf[0] >= outputsize-1) return -1; memcpy(output, buf+1, buf[0]); --gv _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://seclists.org/nmap-dev/
Current thread:
- Illegal character in hostname Gisle Vanem (Jan 07)
- Re: Illegal character in hostname David Fifield (Jan 07)