Shadowsocks-libev 3.3.2 Missing Authentication for Critical Function Vulnerability


An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. 


The information has been provided by Vendor

The original article can be found at:


When utilizing a Stream Cipher and a local_address, arbitrary UDP packets can cause a FATAL error code path and exit. An attacker can send arbitrary UDP packets to trigger this vulnerability.


Vulnerable Systems:

Shadowsocks-libev 3.3.2


CVE Information:



Disclosure Timeline:
Published Date:12/3/2019

Categories: News