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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.023 (82.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000
Affected products
- Shadowsocks Shadowsocks-Libev — versions 3.3.2
- openSUSE Backports — versions sle-15
- openSUSE Leap — versions 15.1
- Shadowsocks — versions Shadowsocks-libev 3.3.2
Weakness classification (CWE)
References
- lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.html (vendor-advisory, Mailing List, Third Party Advisory)
- talosintelligence.com/vulnerability_reports/TALOS-2019-0956 (Exploit, Third Party Advisory)
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.