What is CVE-2019-5163?

CVE-2019-5163 is a high-severity vulnerability in Shadowsocks Shadowsocks-Libev, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2019-12-03.

How severe is CVE-2019-5163?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Shadowsocks Shadowsocks-Libev

CVE-2019-5163

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.

Vulnerability class: Broken Authentication

EPSS: 0.023 (81.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Shadowsocks Shadowsocks-libev — versions 3.3.2
Opensuse Backports — versions sle-15
Opensuse Leap — versions 15.1
N/a Shadowsocks — versions Shadowsocks-libev 3.3.2

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

talos-cna@cisco.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
talos-cna@cisco.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2019-5163?: CVE-2019-5163 is a high-severity vulnerability in Shadowsocks Shadowsocks-Libev, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2019-12-03.
How severe is CVE-2019-5163?: High severity. CVSS v3 base score is 7.5 out of 10.