Vulnerability identifier: #VU17373
Vulnerability risk: High
CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID:
CWE-ID:
CWE-264
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PowerBeam
Hardware solutions /
Firmware
LiteBeam
Hardware solutions /
Firmware
AirGrid
Hardware solutions /
Firmware
NanoStation
Hardware solutions /
Firmware
Vendor: Ubiquiti Networks
Description
The vulnerability allows a remote attacker to conduct DDoS attack.
The weakness exists due to a flaw in a "discovery service" running on port 10001/UDP. A remote attacker can send small packets of 56 bytes to port 10001/UDP on Ubiquiti devices, which are reflecting and relaying the packets to a target's IP address amplified to a size of 206 bytes (amplification factor of 3.67).
Note: the vulnerability has been actively exploited since July 2018.
Mitigation
The vendor has released a workaround, and is in the process of putting together an official fix.
https://community.ubnt.com/t5/EdgeRouter/UDP-broadcasts-on-port-10001/td-p/461223
Vulnerable software versions
PowerBeam: All versions
LiteBeam: All versions
AirGrid: All versions
NanoStation: All versions
External links
https://twitter.com/troutman/status/1090212243197870081
https://blog.rapid7.com/2019/02/01/ubiquiti-discovery-service-exposures/
https://www.us-cert.gov/ncas/alerts/TA14-017A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.