Nmap Development mailing list archives
Re: nmap --iflist bug on Windows
From: Daniel Miller <bonsaiviking () gmail com>
Date: Tue, 10 May 2016 09:11:10 -0500
Niels, Thanks for bringing this up. Here's the code in question that is causing this behavior (libdnet-stripped/src/intf-win32.c): for (addr = a->FirstUnicastAddress; addr != NULL; addr = addr->Next) { IP_ADAPTER_PREFIX *prefix; unsigned short bits; /* Find the netmask length. This is stored in a parallel list. We just take the first one with a matching address family, but that may not be right. Windows Vista and later has an OnLinkPrefixLength member that is stored right with the unicast address. */ bits = 0; for (prefix = a->FirstPrefix; prefix != NULL; prefix = prefix->Next) { if (prefix->Address.lpSockaddr->sa_family == addr->Address.lpSockaddr->sa_family) { bits = (unsigned short) prefix->PrefixLength; break; } } So it sounds like there's an easy fix for Vista and later, but we're tentatively still supporting Windows XP at this point. I think that what we would need to do is to actually compare each prefix to the address in question and only accept the prefix length if they match. I'll be putting this into our issues tracker on Github, and hope to have it solved by the next release. Dan 2016-05-09 9:59 GMT-05:00 Niels Bohr <niels.bohr () spielbank-sh de>:
Hi, I’m writing a GUI, script collection for nmap and came across following problem: Running nmap 7.12 on a Windows 7 x64 PC the –iflist outputs the wrong netmask if you have multiple ip’s on 1 interface with different netmasks. If you configure a 192.168.0.1/24 and 10.0.0.1/8 as ip on the same network card, nmap outputs either: 192.168.0.1/24 10.0.0.1/24 Or 10.0.0.1/8 192.168.0.1/8 The netmask is correct for the first ip found on the device on then used for the second. I tested the same on debian linux with nmap 6.47, the output is correct. Kind regards Niels _________________________________________________________________________________________________ Diese E-Mail und ihre etwaig vorhandenen Anhänge sind ausschließlich für den beabsichtigten Empfänger bestimmt und können vertrauliche Informationen enthalten. Jegliche vom Absender nicht ausdrücklich oder durch eindeutiges schlüssiges Verhalten (welches nicht mit der Übersendung der E-Mail begründet wird) beabsichtigte Veröffentlichung, Vervielfältigung, Weiterleitung oder anderweitige Verwertung ist untersagt und kann straf- oder zivilrechtlich verfolgt werden. Falls Sie diese E-Mail irrtümlich erhalten haben, bitten wir Sie um kurze Nachricht per Telefon oder Fax. Bitte löschen Sie die E-Mail und alle eventuell vorhandenen Kopien unverzüglich von Ihrem Computer-System und veranlassen Sie die Löschung etwaig vorhandener Backups auf anderen Datenträgern, wenn Sie nicht der beabsichtigte Empfänger sein sollten. This e-mail, its content and any files transmitted with it are confidential and may be legally privileged. If you receive it in error or if you are not the intended recipient you must not copy, distribute or take any action in reliance upon it. Please notify us immediately by telephone or fax and delete the e-mail, its attachments and any existing backups. *Spielbank SH GmbH *• Eggerstedtstr.1 • 24103 Kiel Tel.: +49 (431) 981 55 - 0 • Fax: +49 (431) 981 55 - 20 • www.spielbank-sh.de Registergericht AG Kiel HRB 4371 · Steuernummer 19 297 297 92 · UID (VAT)-Nº. DE812971534 Geschäftsführer: Jürgen Kiehne _______________________________________________ Sent through the dev mailing list https://nmap.org/mailman/listinfo/dev Archived at http://seclists.org/nmap-dev/
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Current thread:
- nmap --iflist bug on Windows Niels Bohr (May 10)
- Re: nmap --iflist bug on Windows Daniel Miller (May 10)
- Message not available
- Re: nmap --iflist bug on Windows Daniel Miller (May 10)
- Message not available
- Re: nmap --iflist bug on Windows Daniel Miller (May 10)