usn-7641-1
Vulnerability from osv_ubuntu
Published
2025-07-16 17:42
Modified
2025-10-13 04:42
Summary
bind9 vulnerability
Details

It was discovered that Bind incorrectly handled configurations where the stale-answer-client-timeout option is set to 0. A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service.

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2025-40777",
              "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:25.04"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "bind9",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9-dev",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9-dnsutils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9-host",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9-libs",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9-utils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "bind9utils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          },
          {
            "binary_name": "dnsutils",
            "binary_version": "1:9.20.4-3ubuntu1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.04",
        "name": "bind9",
        "purl": "pkg:deb/ubuntu/bind9@1:9.20.4-3ubuntu1.2?arch=source\u0026distro=plucky"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.20.4-3ubuntu1.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.20.0-2ubuntu3",
        "1:9.20.0-2ubuntu4",
        "1:9.20.4-3ubuntu1",
        "1:9.20.4-3ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that Bind incorrectly handled configurations where the\nstale-answer-client-timeout option is set to 0. A remote attacker could\npossibly use this issue to cause Bind to crash, resulting in a denial of\nservice.",
  "id": "USN-7641-1",
  "modified": "2025-10-13T04:42:07Z",
  "published": "2025-07-16T17:42:21.769692Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-7641-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2025-40777"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "bind9 vulnerability",
  "upstream": [
    "UBUNTU-CVE-2025-40777"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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