Security advisory

{
  "id": "99a1009a29fda225e2d0750eaa30b330e760d21c19ad8e855b837734a530764b",
  "url": "https://osv.dev/vulnerability/CVE-2020-25708",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-25708",
    "summary": "A divide by zero issue was found to occur in libvncserver-0.9.12. A malicious client could use this flaw to send a specially crafted message that, when processed by the VNC server, would lead to a floating point exception, resulting in a denial of service.",
    "evidence": "osv:CVE-2020-25708",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-25708",
      "aliases": [
        "CVE-2020-25708"
      ],
      "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/libvnc/libvncserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0a70095271d845d16a3ed17354841b01f33963ad"
                },
                {
                  "last_affected": "0a70095271d845d16a3ed17354841b01f33963ad"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libvncserver_project:libvncserver:0.9.12:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0.9.12"
                      },
                      {
                        "last_affected": "0.9.12"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.9.12",
            "LibVNCServer-0.9.12"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-25708.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:22.127311523Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2022/09/msg00035.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1896739"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:enterprise_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "6.0"
                  },
                  {
                    "last_affected": "6.0"
                  },
                  {
                    "introduced": "7.0"
                  },
                  {
                    "last_affected": "7.0"
                  },
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-25708",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430614,
  "published_at": "2020-11-27T18:15:11.627+00:00"
}