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I searched in lots of websites/forums but did not find a solution for this problem, and this site is last chance, this is problem: This problem have several other users too. my phone is Galaxy S7 Edge , exynos, Oreo 8.0 (Stock ROM), rooted with magisk latest version. root works well in other applications. In pentesting applications like csploit, Network Spoofer, WifiKill and others root works well(grants permission) but when start using options of app(for example, arp spoofing, network sniffer, MITM, etc) drops same error: [ERROR] Unable to retrieve local hardware address libnet ( ioctl: Permission denied ) what to do? Can this issue fixed? or exactly which permission is it?

Also one interesting thing, when I installed old version of WifiKill app it worked - killed wifi connection.

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  • If old version works it indicates that the problem is with the new version of app(s), probably with latest release of libnet since all apps are based on it. So the only one who can help you with this is the app developer. For us [ERROR] Unable to retrieve local hardware address libnet ( ioctl: Permission denied ) is not enough to figure out why libnet was unable to get MAC address and which ioctl failed. More logs are required. If command-line execution is possible get strace output.
    – Irfan Latif
    Feb 28, 2020 at 21:04
  • I do not know well commands, but I found this app CatLog and recorded logs, maybe its what is needed for this situation? I cut several lines about application(network spoofer).
    – omari
    Feb 28, 2020 at 22:25
  • 02-29 02:11:49.571 V/android-netspoof(10524): cout: Current Wifi IP: 192.168.0.100 02-29 02:11:49.571 V/android-netspoof(10524): cout: Current subnet: 192.168.0.0 02-29 02:11:49.571 V/android-netspoof(10524): cout: Subnet mask: 255.255.255.0 02-29 02:11:49.571 V/android-netspoof(10524): cout: Enabling ip_forward
    – omari
    Feb 28, 2020 at 22:27
  • 02-29 02:11:49.572 V/android-netspoof(10524): cout: Starting ARP Spoofing 02-29 02:11:49.572 V/android-netspoof(10524): cout: arpspoof -i wlan0 -t 192.168.0.102 192.168.0.1 02-29 02:11:49.572 V/android-netspoof(10524): cout: iptables -P FORWARD ACCEPT 02-29 02:11:49.572 V/android-netspoof(10524): cout: iptables -I natctrl_FORWARD -j RETURN 02-29 02:11:49.572 V/android-netspoof(10524): cout: iptables -t nat -A POSTROUTING -j MASQUERADE 02-29 02:11:49.572 V/android-netspoof(10524): cout: iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 3128
    – omari
    Feb 28, 2020 at 22:29
  • 02-29 02:11:49.572 V/android-netspoof(10524): cout: dSploit ArpSpoofer. 02-29 02:11:49.572 V/android-netspoof(10524): cout: 02-29 02:11:49.573 V/android-netspoof(10524): cout: [ERROR] Unable to retrieve local hardware address libnet ( ioctl: Permission denied ).
    – omari
    Feb 28, 2020 at 22:29

1 Answer 1

Reset to default
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finally, I solved this problem , it needed permissive selinux mode, so I installed custom kernel on my phone and everything works perfect.

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