arp-scan returns an empty scan

[zebul666]

in 19.10, arp-scan (1.9.5) does not work as expected anymore.

It just returns an empty scan when run:

$ sudo arp-scan -I enp1s0 -l -r 3
Interface: enp1s0, datalink type: EN10MB (Ethernet)
Starting arp-scan 1.9.5 with 256 hosts (https://github.com/royhills/arp-scan)

24 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.5: 256 hosts scanned in 3.235 seconds (79.13 hosts/sec). 0 responded

This is not expected. It was working fine in 19.04.

Moreover, compiling an running arp-scan from https://github.com/royhills/arp-scan works as expected:

$ sudo ./arp-scan -I enp1s0 -l
Interface: enp1s0, type: EN10MB, MAC: xx:xx:xx:xx:xx:xx, IPv4: 192.168.44.115
Starting arp-scan 1.9.6 with 256 hosts (https://github.com/royhills/arp-scan)
192.168.44.1 xx:xx:xx:xx:xx:xx YYYYY
192.168.44.55 xx:xx:xx:xx:xx:xx YYYY
192.168.44.106 xx:xx:xx:xx:xx:xx GGGG
192.168.44.117 xx:xx:xx:xx:xx:xx HHHH
192.168.44.121 xx:xx:xx:xx:xx:xx HJJJJJ
192.168.44.103 xx:xx:xx:xx:xx:xx GGHJJ
192.168.44.110 xx:xx:xx:xx:xx:xx HHHH
192.168.44.230 xx:xx:xx:xx:xx:xx JJJJ

8 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.6: 256 hosts scanned in 2.105 seconds (121.62 hosts/sec). 8 responded

scan has been redacted

Please upgrade to 1.9.6 or even the upcoming 1.9.7 or apply any needed fix. thanks

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: arp-scan 1.9.5-1build1
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 24 23:55:06 2019
InstallationDate: Installed on 2018-05-07 (535 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: arp-scan
UpgradeStatus: Upgraded to eoan on 2019-10-23 (1 days ago)

[Claudio (claudio-fischer)]

I can confirm this bug in Ubuntu 19.10

[fiver22 (fiver22)]

I experienced this behaviour in Ubuntu 19.10 deriv. (Pop!_OS) -tried older .debs to no avail. built latest from github and is now working as expected.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[VAP (shnushnu)]

Any updates on a fix for Ubuntu?

I'm still encountering this issue on Ubuntu 19.10 using arp-scan 1.9.5.

[Carroarmato0 (carroarmato0)]

Still present, using nmap as a workaround for the time beeing: sudo nmap -sP -PR <network>

[Esteban Richmond-Salazar (ersiq)]

I confirm this bug in version 1.9.5