nmap crash when destination unreachable message received

[Adam Badaoui <adam.badaoui () cyberis co uk>]

A bug has been identified in the latest beta version of nmap - Nmap 6.49BETA1

nmap -V
Nmap version 6.49BETA1 ( http://nmap.org )
Platform: x86_64-unknown-linux-gnu
Compiled with: nmap-liblua-5.2.3 openssl-1.0.1f libpcre-8.31 nmap-libpcap-1.7.3 nmap-libdnet-1.12 ipv6
Compiled without:
Available nsock engines: epoll poll select

OS: Ubuntu 14.04 (tested on Desktop and Server)

When nmap undergoes host discovery, if a host responds with an ICMP Destination Unreachable, Nmap aborts with the 
following error:

nmap: scan_engine_raw.cc:206: u16 UltraProbe::icmpid() const: Assertion `mypspec.proto == IPPROTO_ICMP || mypspec.proto 
== IPPROTO_ICMPV6' failed.
Aborted (core dumped)

This issue has been reproduced with ICMP Destination Unreachable types 13 (Communication Administratively Prohibited) 
and type 0 (Net Unreachable) messages. Other Destination Unreachable messages may also be affected.


Adam Badaoui  |  Consultant
Cyberis Limited |  www.cyberis.co.uk<http://www.cyberis.co.uk>
Tel: +44 (0)3333 406485
Mobile: +44 (0)7477 632736

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