USN-8037-1 (UBUNTU-CVE-2025-8671)

Vulnerability from osv_ubuntu – Published: 2026-02-12 15:41 – Updated: 2026-04-27 14:11 – Source website
VLAI
Summary
dnsdist vulnerabilities
Details

It was discovered that HTTP/2, which is used/vendored by DNSdist, did not properly account for resources when handling client-triggered stream resets. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-8671)

It was discovered that DNSdist did not properly manage memory limits when handling an unlimited number of queries on a single TCP connection. An attacker could possibly use this issue to cause a denial of service. (CVE-2025-30193)

It was discovered that DNSdist, when configured with the nghttp2 library, did not correctly process certain DNS over HTTPS queries. An attacker could possibly use this cause a denial of service. (CVE-2025-30187)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-30193",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:22.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "dnsdist",
            "binary_version": "1.6.1-1ubuntu0.1~esm2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "dnsdist",
        "purl": "pkg:deb/ubuntu/dnsdist@1.6.1-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.1-1ubuntu0.1~esm2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.5.1-3build2",
        "1.6.1-1build1",
        "1.6.1-1ubuntu0.1~esm1"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-8671",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-30193",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:24.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "dnsdist",
            "binary_version": "1.8.3-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:24.04:LTS",
        "name": "dnsdist",
        "purl": "pkg:deb/ubuntu/dnsdist@1.8.3-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.3-2ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.8.0-1",
        "1.8.2-1",
        "1.8.2-2",
        "1.8.2-3",
        "1.8.3-1",
        "1.8.3-2",
        "1.8.3-2build1",
        "1.8.3-2build2"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-8671",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-30187",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:25.10"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "dnsdist",
            "binary_version": "1.9.10-1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "dnsdist",
        "purl": "pkg:deb/ubuntu/dnsdist@1.9.10-1ubuntu0.1?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.10-1ubuntu0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.8-1",
        "1.9.10-1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that HTTP/2, which is used/vendored by DNSdist, did not\nproperly account for resources when handling client-triggered stream \nresets. An attacker could possibly use this issue to cause a \ndenial of service. (CVE-2025-8671)\n\nIt was discovered that DNSdist did not properly manage memory limits when\nhandling an unlimited number of queries on a single TCP connection. An \nattacker could possibly use this issue to cause a denial of service.\n(CVE-2025-30193)\n\nIt was discovered that DNSdist, when configured with the nghttp2 library,\ndid not correctly process certain DNS over HTTPS queries. An attacker\ncould possibly use this cause a denial of service. (CVE-2025-30187)",
  "id": "USN-8037-1",
  "modified": "2026-04-27T14:11:49Z",
  "published": "2026-02-12T15:41:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-8037-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-8671"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-30187"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-30193"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "dnsdist vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-8671",
    "UBUNTU-CVE-2025-30187",
    "UBUNTU-CVE-2025-30193"
  ]
}



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