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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.66% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 85.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2019-12-03 21:55Z6 YR AGO
- Last updated
- 2024-08-04 19:47Z2 YR AGO
- Reserved
- 2019-01-04
- Assigning CNA
- talos
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.9)
- CNA CVSS vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-306Missing Authentication for Critical FunctionBase
- Data version
- 5.1
- Document digest
- 053f7ec97ae22e5cff661376cbfea062d7eb6d627fbf380e22e625af8a1b89de
05 Affected products
06 References
- lists.opensuse.orgopenSUSE-SU-2019:2667http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.html
- lists.opensuse.orgopenSUSE-SU-2020:0142http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.html
- talosintelligence.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2019-0956
07 Fixed in
Debian 12
- shadowsocks-libev Fixed in 3.3.3+ds-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- shadowsocks-libev Fixed in 3.3.3+ds-2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- shadowsocks-libev No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.