USN-7836-2 (UBUNTU-CVE-2025-8677)

Vulnerability from osv_ubuntu – Published: 2025-11-12 15:42 – Updated: 2026-04-27 14:11 – Source website
VLAI
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"
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.