CVE-2019-5163

Name: CVE-2019-5163
Creator: NVD / NIST
Published: 2019-12-03T22:15:15.37+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.29%

Last modified Jun 17, 2026

CVE-2019-5163 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 2.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

2.29%

81.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Shadowsocks	Shadowsocks-Libev	3.3.2	—
Opensuse	Backports	sle-15	Sp1
Opensuse	Leap	15.1	—

References

http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.htmlMailing List, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956Exploit, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.htmlMailing List, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956Exploit, Third Party Advisory

Timeline

Published: Dec 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-5163?

How severe is CVE-2019-5163?

CVE-2019-5163 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.29% probability of exploitation in the next 30 days.

How do I fix CVE-2019-5163?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-5163?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST