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TI-2019-03619 Aliases CVE-2019-5163GHSA-vc3w-rpc8-4w8g

Missing authentication in Shadowsocks

Priority LOW 38CWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-306.

Summary

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.

Why it matters now

EPSS 0.02664 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—ShadowsocksShadowsocks-libev 3.3.2—No fix listedCNA
  • Shadowsocks Vendor— Affected Shadowsocks-libev 3.3.2 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:shadowsocks:shadowsocks-libev:3.3.2:*:*:*:*:*:*:*3.3.2VulnerableShadowsocks
cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*sle-15 sp1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:a:shadowsocks:shadowsocks-libev:3.3.2:*:*:*:*:*:*:* Versions 3.3.2 Vulnerable ·Shadowsocks
  • cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:* Versions sle-15 sp1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Shadowsocks — openSUSE-SU-2019:2667

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2019-03620 Missing authentication in ShadowsocksPriority LOW 35
    Show all 2 records → Advisory →
  • Advisory ·

    Shadowsocks — openSUSE-SU-2020:0142

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2019-03620 Missing authentication in ShadowsocksPriority LOW 35
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-5163
  2. 2026-10-03 Alias added: GHSA-vc3w-rpc8-4w8g

References

Exploit 1

Advisory 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences