usn-7836-2
Vulnerability from osv_ubuntu
Published
2025-11-12 15:42
Modified
2026-04-27 14:11
Summary
bind9 vulnerabilities
Details

USN-7836-1 fixed vulnerabilities in Bind. This update provides the corresponding fixes for Ubuntu 20.04 LTS.

Original advisory details:

Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain malformed DNSKEY records. A remote attacker could possibly use this issue to cause Bind to consume resources, resulting in a denial of service. (CVE-2025-8677)

Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind incorrectly accepted certain records from answers. A remote attacker could possibly use this issue to perform a cache poisoning attack. (CVE-2025-40778)

Amit Klein and Omer Ben Simhon discovered that Bind used a weak PRNG. A remote attacker could possibly use this issue to perform a cache poisoning attack. (CVE-2025-40780)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-8677",
              "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-2025-40778",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2025-40780",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:Pro:20.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.18.30-0ubuntu0.20.04.2+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.18.30-0ubuntu0.20.04.2+esm1?arch=source\u0026distro=esm-infra/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.18.30-0ubuntu0.20.04.2+esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.11.5.P4+dfsg-5.1ubuntu2",
        "1:9.11.5.P4+dfsg-5.1ubuntu3",
        "1:9.11.5.P4+dfsg-5.1ubuntu4",
        "1:9.11.5.P4+dfsg-5.1ubuntu5",
        "1:9.11.14+dfsg-1ubuntu1",
        "1:9.11.14+dfsg-3ubuntu1",
        "1:9.16.0-1ubuntu3",
        "1:9.16.0-1ubuntu4",
        "1:9.16.0-1ubuntu5",
        "1:9.16.1-0ubuntu1",
        "1:9.16.1-0ubuntu2",
        "1:9.16.1-0ubuntu2.1",
        "1:9.16.1-0ubuntu2.2",
        "1:9.16.1-0ubuntu2.3",
        "1:9.16.1-0ubuntu2.4",
        "1:9.16.1-0ubuntu2.6",
        "1:9.16.1-0ubuntu2.7",
        "1:9.16.1-0ubuntu2.8",
        "1:9.16.1-0ubuntu2.9",
        "1:9.16.1-0ubuntu2.10",
        "1:9.16.1-0ubuntu2.11",
        "1:9.16.1-0ubuntu2.12",
        "1:9.16.1-0ubuntu2.14",
        "1:9.16.1-0ubuntu2.15",
        "1:9.16.1-0ubuntu2.16",
        "1:9.16.48-0ubuntu0.20.04.1",
        "1:9.18.28-0ubuntu0.20.04.1",
        "1:9.18.30-0ubuntu0.20.04.1",
        "1:9.18.30-0ubuntu0.20.04.2"
      ]
    }
  ],
  "aliases": [],
  "details": "USN-7836-1 fixed vulnerabilities in Bind. This update provides the\ncorresponding fixes for Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain\n malformed DNSKEY records. A remote attacker could possibly use this issue\n to cause Bind to consume resources, resulting in a denial of service.\n (CVE-2025-8677)\n\n Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind\n incorrectly accepted certain records from answers. A remote attacker could\n possibly use this issue to perform a cache poisoning attack.\n (CVE-2025-40778)\n\n Amit Klein and Omer Ben Simhon discovered that Bind used a weak PRNG. A\n remote attacker could possibly use this issue to perform a cache poisoning\n attack. (CVE-2025-40780)",
  "id": "USN-7836-2",
  "modified": "2026-04-27T14:11:46Z",
  "published": "2025-11-12T15:42:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7836-2"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-8677"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40778"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40780"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2025-8677",
    "UBUNTU-CVE-2025-40778",
    "UBUNTU-CVE-2025-40780"
  ]
}



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