Netcat on Debian Security advice please nc -(dknl)

I would be very grateful for some help:
This is with regards to a Netcat based script running on a Debian based distribution, specifically the Proxmox hypervisor (see here if unknown https://en.wikipedia.org/wiki/Proxmox_Virtual_Environment)
I would need to run a script to start a Virtual Machine from a remote PC within the network. The script running on this Proxmox (Debian) distribution is as follows:
nc -dknl -p 9 -u |
stdbuf -o0 xxd -c 6 -p |
stdbuf -o0 uniq |
stdbuf -o0 grep -v 'ffffffffffff' |
while read ; do
MAC=${REPLY:0:2}:${REPLY:2:2}:${REPLY:4:2}:${REPLY:6:2}:${REPLY:8:2}:${REPLY:10:2};
echo Received Address: $MAC
if [ "$MAC" == "0c:d2:92:48:68:9b" ]
then echo STARTING VM!
qm start 101 # Proxmox Command to start Virtual machine.
fi
done
Could the Debian running above script be exploited, as Netcat listens on Port 9 UDP (it could of course listen to another port as well if I change that)? Naturally, anyone in the network could start a VM, but is there another risk?
Categories
- All Categories
- 50 LFX Mentorship
- 103 LFX Mentorship: Linux Kernel
- 553 Linux Foundation Boot Camps
- 296 Cloud Engineer Boot Camp
- 119 Advanced Cloud Engineer Boot Camp
- 52 DevOps Engineer Boot Camp
- 53 Cloud Native Developer Boot Camp
- 4 Express Training Courses
- 4 Express Courses - Discussion Forum
- 1.9K Training Courses
- 18 LFC110 Class Forum
- 7 LFC131 Class Forum
- 25 LFD102 Class Forum
- 150 LFD103 Class Forum
- 17 LFD121 Class Forum
- LFD137 Class Forum
- 61 LFD201 Class Forum
- LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 598 LFD259 Class Forum
- 102 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- LFD273 Class Forum
- 2 LFS145 Class Forum
- 24 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 3 LFS203 Class Forum
- 69 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 34 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 140 LFS253 Class Forum
- LFS254 Class Forum
- 1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 92 LFS260 Class Forum
- 130 LFS261 Class Forum
- 32 LFS262 Class Forum
- 79 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 17 LFS267 Class Forum
- 17 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS281 Class Forum
- 221 LFW211 Class Forum
- 167 LFW212 Class Forum
- SKF100 Class Forum
- 902 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 761 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 141 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 356 Ubuntu
- 477 Linux System Administration
- 41 Cloud Computing
- 69 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 77 Network Management
- 108 System Management
- 49 Web Management
- 66 Mobile Computing
- 23 Android
- 29 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 536 Off Topic
- 131 Introductions
- 216 Small Talk
- 21 Study Material
- 817 Programming and Development
- 275 Kernel Development
- 508 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 59 All In Program
- 59 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)