Security advisory

{
  "id": "3415977f81bd8394c1455946efe8ebc1e20d3aa85aefe118fa4e72b420e4eabb",
  "url": "https://osv.dev/vulnerability/CVE-2019-5163",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-5163",
    "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.",
    "evidence": "osv:CVE-2019-5163",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-5163",
      "aliases": [
        "CVE-2019-5163"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/shadowsocks/shadowsocks-c",
              "type": "GIT",
              "events": [
                {
                  "introduced": "346ab1be4717e26d641635d6f3ece14899688c49"
                },
                {
                  "last_affected": "346ab1be4717e26d641635d6f3ece14899688c49"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:shadowsocks:shadowsocks-libev:3.3.2:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "3.3.2"
                      },
                      {
                        "last_affected": "3.3.2"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3.2",
            "v3.3.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-5163.json"
          }
        }
      ],
      "modified": "2026-10-24T10:31:01.023040107Z",
      "provider": "osv",
      "references": [
        "https://talosintelligence.com/vulnerability_reports/TALOS-2019-0956"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:opensuse:backports:sle-15:sp1:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:backports",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "sle-15-sp1"
                  },
                  {
                    "last_affected": "sle-15-sp1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "15.1"
                  },
                  {
                    "last_affected": "15.1"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2019-5163",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 439698,
  "published_at": "2019-12-03T22:15:15.37+00:00"
}