certfr_avis - CERTFR-2025-AVI-0596

CERTFR-2025-AVI-0596

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été découvertes dans ISC BIND. Elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données et un contournement de la politique de sécurité.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
ISC	BIND	Bind versions 9.20.x antérieures à 9.20.11
ISC	BIND Supported Preview Edition	BIND Supported Preview Edition versions 9.20.x antérieures à 9.20.11-S1
ISC	BIND	Bind versions 9.21.x antérieures à 9.21.10
ISC	BIND Supported Preview Edition	BIND Supported Preview Edition versions antérieures à 9.18.38-S1

References

Title

Publication Time

Tags

Bulletin de sécurité ISC BIND cve-2025-40776	2025-07-16	vendor-advisory
Bulletin de sécurité ISC BIND cve-2025-40777	2025-07-16	vendor-advisory

Show details on source website

JSON

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{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Bind versions 9.20.x ant\u00e9rieures \u00e0 9.20.11",
      "product": {
        "name": "BIND",
        "vendor": {
          "name": "ISC",
          "scada": false
        }
      }
    },
    {
      "description": "BIND Supported Preview Edition versions 9.20.x ant\u00e9rieures \u00e0 9.20.11-S1",
      "product": {
        "name": "BIND Supported Preview Edition",
        "vendor": {
          "name": "ISC",
          "scada": false
        }
      }
    },
    {
      "description": "Bind versions 9.21.x ant\u00e9rieures \u00e0 9.21.10",
      "product": {
        "name": "BIND",
        "vendor": {
          "name": "ISC",
          "scada": false
        }
      }
    },
    {
      "description": "BIND Supported Preview Edition versions ant\u00e9rieures \u00e0 9.18.38-S1",
      "product": {
        "name": "BIND Supported Preview Edition",
        "vendor": {
          "name": "ISC",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2025-40777",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40777"
    },
    {
      "name": "CVE-2025-40776",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-40776"
    }
  ],
  "links": [],
  "reference": "CERTFR-2025-AVI-0596",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2025-07-17T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans ISC BIND. Elles permettent \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans ISC BIND",
  "vendor_advisories": [
    {
      "published_at": "2025-07-16",
      "title": "Bulletin de s\u00e9curit\u00e9 ISC BIND cve-2025-40776",
      "url": "https://kb.isc.org/v1/docs/cve-2025-40776"
    },
    {
      "published_at": "2025-07-16",
      "title": "Bulletin de s\u00e9curit\u00e9 ISC BIND cve-2025-40777",
      "url": "https://kb.isc.org/v1/docs/cve-2025-40777"
    }
  ]
}

CVE-2025-40777 (GCVE-0-2025-40777)

Vulnerability from cvelistv5 – Published: 2025-07-16 17:38 – Updated: 2025-11-04 21:10

Summary

If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-617 - Reachable Assertion

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/cve-2025-40777

vendor-advisory

Impacted products

	Vendor	Product	Version
	ISC	BIND 9	Affected: 9.20.0 , ≤ 9.20.10 (custom) Affected: 9.21.0 , ≤ 9.21.9 (custom) Affected: 9.20.9-S1 , ≤ 9.20.10-S1 (custom) Unaffected: 9.18.0 , ≤ 9.18.37 (custom) Unaffected: 9.18.11-S1 , ≤ 9.18.37-S1 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-40777",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-18T14:25:41.033326Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-18T14:25:48.883Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-04T21:10:12.751Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2025/07/16/6"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "9.20.10",
              "status": "affected",
              "version": "9.20.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.21.9",
              "status": "affected",
              "version": "9.21.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.20.10-S1",
              "status": "affected",
              "version": "9.20.9-S1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.37",
              "status": "unaffected",
              "version": "9.18.0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.37-S1",
              "status": "unaffected",
              "version": "9.18.11-S1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2025-07-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "This flaw was discovered in internal testing. We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "If an attacker is able to make queries that yield the necessary combination of circumstances, they can force `named` to exit."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-617",
              "description": "CWE-617 Reachable Assertion",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-16T17:38:06.370Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2025-40777",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2025-40777"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.11, 9.21.10, or 9.20.11-S1."
        }
      ],
      "source": {
        "discovery": "INTERNAL"
      },
      "title": "A possible assertion failure when \u0027stale-answer-client-timeout\u0027 is set to \u00270\u0027",
      "workarounds": [
        {
          "lang": "en",
          "value": "Setting either of `stale-answer-client-timeout off;` or `stale-answer-enable no;` in the configuration file will prevent the assertion."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2025-40777",
    "datePublished": "2025-07-16T17:38:06.370Z",
    "dateReserved": "2025-04-16T08:44:49.856Z",
    "dateUpdated": "2025-11-04T21:10:12.751Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-40776 (GCVE-0-2025-40776)

Vulnerability from cvelistv5 – Published: 2025-07-16 13:41 – Updated: 2025-07-22 14:55

Summary

A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack. This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.

Severity ?

8.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CWE

CWE-349 - Acceptance of Extraneous Untrusted Data With Trusted Data

Assigner

isc

References

URL

Tags

https://kb.isc.org/docs/cve-2025-40776

vendor-advisory

Impacted products

	Vendor	Product	Version
	ISC	BIND 9	Affected: 9.11.3-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.37-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.10-S1 (custom) Unaffected: 9.0.0 , ≤ 9.20.10 (custom)

Credits

ISC would like to thank Xiang Li from AOSP Lab of Nankai University for bringing this vulnerability to our attention.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-40776",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-07-22T14:54:56.292632Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-07-22T14:55:04.420Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "BIND 9",
          "vendor": "ISC",
          "versions": [
            {
              "lessThanOrEqual": "9.16.50-S1",
              "status": "affected",
              "version": "9.11.3-S1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.18.37-S1",
              "status": "affected",
              "version": "9.18.11-S1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.20.10-S1",
              "status": "affected",
              "version": "9.20.9-S1",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "9.20.10",
              "status": "unaffected",
              "version": "9.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "ISC would like to thank Xiang Li from AOSP Lab of Nankai University for bringing this vulnerability to our attention."
        }
      ],
      "datePublic": "2025-07-16T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack.\nThis issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "We are not aware of any active exploits."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "A resolver configured to send ECS options to authoritative servers can be compelled to make queries that slightly increase the odds of guessing the source port and other details necessary to bypass the original birthday cache poisoning attack mitigations. As a result of this weakness, a resolver with ECS enabled is more vulnerable to successful cache poisoning via spoofed query responses than one that does not implement this feature."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-349",
              "description": "CWE-349 Acceptance of Extraneous Untrusted Data With Trusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-07-16T13:41:01.337Z",
        "orgId": "404fd4d2-a609-4245-b543-2c944a302a22",
        "shortName": "isc"
      },
      "references": [
        {
          "name": "CVE-2025-40776",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://kb.isc.org/docs/cve-2025-40776"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to the patched release most closely related to your current version of BIND 9: 9.18.38-S1 or 9.20.11-S1."
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Birthday Attack against Resolvers supporting ECS",
      "workarounds": [
        {
          "lang": "en",
          "value": "Disable ECS in BIND by removing the `ecs-zones` option from `named.conf`."
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
    "assignerShortName": "isc",
    "cveId": "CVE-2025-40776",
    "datePublished": "2025-07-16T13:41:01.337Z",
    "dateReserved": "2025-04-16T08:44:49.856Z",
    "dateUpdated": "2025-07-22T14:55:04.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CERTFR-2025-AVI-0596

Solutions

CVE-2025-40777 (GCVE-0-2025-40777)

CVE-2025-40776 (GCVE-0-2025-40776)

Tags

Sightings

Nomenclature