{"cve":"CVE-2019-5163","nvd":{"published":"2019-12-03T22:15:15.370","modified":"2026-06-17T02:37:14.533","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-306"],"references":["http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.html","http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.html","https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956","http://lists.opensuse.org/opensuse-security-announce/2019-12/msg00023.html","http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00061.html"],"products":["opensuse:backports","opensuse:leap","shadowsocks:shadowsocks-libev"],"source":"nvd","synced_at":"2026-10-19T20:59:27.069234358+00:00"},"epss":{"cve":"CVE-2019-5163","score":0.02664,"percentile":0.85719,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}