Is CVE-2019-5163 in the CISA KEV catalog?

No. CVE-2019-5163 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-5163?

CVE-2019-5163 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-5163?

CVE-2019-5163 has an EPSS score of 2.29% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-5163?

Upgrade shadowsocks-libev on debian 11 to 3.3.3+ds-2 or later.

CVE & CISA-KEV Catalog

CVE-2019-5163

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

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.

CWE-306Missing Authentication for Critical Function

How to fix

Remediation Available

shadowsocks-libevDebian

Fixed in:3.3.3+ds-2CVE-2019-5163

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.29%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Exploit1

talosintelligence.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-10271	High	7.5	100%	KEV + Ransom	-
CVE-2023-42793	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2025-3248	Critical	9.8	100%	KEV	Fix
CVE-2022-1388	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2021-37415	Critical	9.8	100%	KEV	-
CVE-2023-21839	High	7.5	100%	KEV	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.