Security advisory

{
  "id": "896174ac8852dfde3e058a8324bcff67431fc9885cc789a61664d6e9702ce34e",
  "url": "https://osv.dev/vulnerability/CVE-2020-12823",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-12823",
    "summary": "OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.",
    "evidence": "osv:CVE-2020-12823",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-12823",
      "aliases": [
        "CVE-2020-12823"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openconnect/openconnect",
              "type": "GIT",
              "events": [
                {
                  "introduced": "946ebe7fbb124877f86dbca88dcdcfb889f7058f"
                },
                {
                  "last_affected": "946ebe7fbb124877f86dbca88dcdcfb889f7058f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:infradead:openconnect:8.09:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.09"
                      },
                      {
                        "last_affected": "8.09"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "8.09",
            "v8.09"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12823.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:54.330248336Z",
      "provider": "osv",
      "references": [
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/25MFX4AZE7RDCUWOL4ZOE73YBOPUMQDX/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYSXLXAPXD2T73T6JMHI5G2WP7KHAGMN/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BEVTIH5UFX35CC7MVSYBGRM3D66ACFD5/",
        "https://lists.debian.org/debian-lts-announce/2020/05/msg00015.html",
        "https://security.gentoo.org/glsa/202006-15",
        "https://gitlab.com/openconnect/openconnect/-/merge_requests/108",
        "https://bugs.gentoo.org/721570"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "30"
                  },
                  {
                    "last_affected": "30"
                  },
                  {
                    "introduced": "31"
                  },
                  {
                    "last_affected": "31"
                  },
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*",
              "cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*"
            ],
            "vendor_product": "opensuse:leap",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "15.1"
                  },
                  {
                    "last_affected": "15.1"
                  },
                  {
                    "introduced": "15.2"
                  },
                  {
                    "last_affected": "15.2"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-12823",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438135,
  "published_at": "2020-05-12T18:15:13.473+00:00"
}