CVE-2019-5163

Name	CVE-2019-5163
Description	An exploitable denial-of-service vulnerability exists in the UDPRelay functionality of Shadowsocks-libev 3.3.2. 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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
shadowsocks-libev (PTS)	stretch (security), stretch	2.6.3+ds-3+deb9u1	vulnerable
	buster	3.2.5+ds-1	vulnerable
	bullseye, sid	3.3.3+ds-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
shadowsocks-libev	source	(unstable)	3.3.3+ds-2

https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956
https://github.com/shadowsocks/shadowsocks-libev/issues/2536