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CVE-2019-5163

Published: 3 December 2019

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
shadowsocks-libev
Launchpad, Ubuntu, Debian
hirsute Not vulnerable
(3.3.3+ds-3)
jammy Not vulnerable
(3.3.3+ds-3)
kinetic Not vulnerable
(3.3.3+ds-3)
lunar Not vulnerable
(3.3.3+ds-3)
bionic Needs triage

disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable
(3.3.3+ds-3)
groovy Not vulnerable
(3.3.3+ds-3)
impish Not vulnerable
(3.3.3+ds-3)
trusty Does not exist

upstream
Released (3.3.3+ds-2)
xenial Does not exist

mantic Not vulnerable
(3.3.3+ds-3)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H