Vulnerability-Lookup

OESA-2022-1836 (CVE-2022-30698)

Vulnerability from osv_openeuler – Published: 2022-08-13 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

unbound security update

Details

Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards.To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows.Unbound is a totally free, open source software under the BSD license. It doesn'tmake custom builds or provide specific features to paying customers only.

Security Fix(es):

NLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound's delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.(CVE-2022-30698)

NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.(CVE-2022-30699)

Severity

6.5 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-30698	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2022-30699	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "unbound-debugsource-1.11.0-7.oe1.aarch64.rpm",
          "python3-unbound-1.11.0-7.oe1.aarch64.rpm",
          "unbound-debuginfo-1.11.0-7.oe1.aarch64.rpm",
          "unbound-help-1.11.0-7.oe1.aarch64.rpm",
          "unbound-libs-1.11.0-7.oe1.aarch64.rpm",
          "unbound-devel-1.11.0-7.oe1.aarch64.rpm",
          "unbound-1.11.0-7.oe1.aarch64.rpm"
        ],
        "src": [
          "unbound-1.11.0-7.oe1.src.rpm"
        ],
        "x86_64": [
          "unbound-debugsource-1.11.0-7.oe1.x86_64.rpm",
          "python3-unbound-1.11.0-7.oe1.x86_64.rpm",
          "unbound-devel-1.11.0-7.oe1.x86_64.rpm",
          "unbound-1.11.0-7.oe1.x86_64.rpm",
          "unbound-help-1.11.0-7.oe1.x86_64.rpm",
          "unbound-debuginfo-1.11.0-7.oe1.x86_64.rpm",
          "unbound-libs-1.11.0-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "unbound",
        "purl": "pkg:rpm/openEuler/unbound\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.0-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
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          "unbound-1.11.0-6.oe1.aarch64.rpm",
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          "unbound-libs-1.11.0-6.oe1.aarch64.rpm",
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        "src": [
          "unbound-1.11.0-6.oe1.src.rpm"
        ],
        "x86_64": [
          "unbound-1.11.0-6.oe1.x86_64.rpm",
          "unbound-libs-1.11.0-6.oe1.x86_64.rpm",
          "python3-unbound-1.11.0-6.oe1.x86_64.rpm",
          "unbound-help-1.11.0-6.oe1.x86_64.rpm",
          "unbound-devel-1.11.0-6.oe1.x86_64.rpm",
          "unbound-debugsource-1.11.0-6.oe1.x86_64.rpm",
          "unbound-debuginfo-1.11.0-6.oe1.x86_64.rpm"
        ]
      },
      "package": {
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        "purl": "pkg:rpm/openEuler/unbound\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.0-6.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "unbound-debuginfo-1.13.2-5.oe2203.aarch64.rpm",
          "unbound-help-1.13.2-5.oe2203.aarch64.rpm",
          "unbound-1.13.2-5.oe2203.aarch64.rpm",
          "unbound-devel-1.13.2-5.oe2203.aarch64.rpm",
          "python3-unbound-1.13.2-5.oe2203.aarch64.rpm",
          "unbound-debugsource-1.13.2-5.oe2203.aarch64.rpm",
          "unbound-libs-1.13.2-5.oe2203.aarch64.rpm"
        ],
        "src": [
          "unbound-1.13.2-5.oe2203.src.rpm"
        ],
        "x86_64": [
          "unbound-debugsource-1.13.2-5.oe2203.x86_64.rpm",
          "unbound-help-1.13.2-5.oe2203.x86_64.rpm",
          "unbound-debuginfo-1.13.2-5.oe2203.x86_64.rpm",
          "unbound-devel-1.13.2-5.oe2203.x86_64.rpm",
          "python3-unbound-1.13.2-5.oe2203.x86_64.rpm",
          "unbound-libs-1.13.2-5.oe2203.x86_64.rpm",
          "unbound-1.13.2-5.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "unbound",
        "purl": "pkg:rpm/openEuler/unbound\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.13.2-5.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "Unbound is a validating, recursive, caching DNS resolver. It is designed to be fast and lean and incorporates modern features based on open standards.To help increase online privacy, Unbound supports DNS-over-TLS which allows clients to encrypt their communication. Unbound is available for most platforms such as FreeBSD, OpenBSD, NetBSD, MacOS, Linux and Microsoft Windows.Unbound is a totally free, open source software under the BSD license. It doesn\u0027tmake custom builds or provide specific features to paying customers only.\r\n\r\nSecurity Fix(es):\r\n\r\nNLnet Labs Unbound, up to and including version 1.16.1 is vulnerable to a novel type of the \u0026quot;ghost domain names\u0026quot; attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound\u0026apos;s delegation cache. This action can be repeated before expiry of the delegation information by querying Unbound for a second level subdomain which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation. From version 1.16.2 on, Unbound checks the validity of parent delegation records before using cached delegation information.(CVE-2022-30698)\r\n\r\nNLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the \u0026quot;ghost domain names\u0026quot; attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.(CVE-2022-30699)",
  "id": "OESA-2022-1836",
  "modified": "2026-08-06T11:05:06Z",
  "published": "2022-08-13T11:05:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1836"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-30698"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-30699"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "unbound security update",
  "upstream": [
    "CVE-2022-30698",
    "CVE-2022-30699"
  ]
}

CVE-2022-30698 (GCVE-0-2022-30698)

Vulnerability from cvelistv5 – Published: 2022-08-01 14:13 – Updated: 2024-09-16 19:35

Title

Novel "ghost domain names" attack by introducing subdomain delegations

Summary

Severity

No CVSS data available.

CWE

Assigner

NLnet Labs

References

5 references

URL	Tags
https://www.nlnetlabs.nl/downloads/unbound/CVE-20…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202212-02	vendor-advisory
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Impacted products

1 product

Vendor	Product	Version
NLnet Labs	Unbound	Affected: unspecified , ≤ 1.16.1 (custom)

Date Public

2022-08-01 00:00

Credits

We would like to thank Xiang Li from the Network and Information Security Lab of Tsinghua University for discovering and disclosing the vulnerability.

Show details on NVD website

JSON

To clipboard

{
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        },
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          "tags": [
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      "title": "Novel \"ghost domain names\" attack by introducing subdomain delegations"
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CVE-2022-30699 (GCVE-0-2022-30699)

Vulnerability from cvelistv5 – Published: 2022-08-01 14:13 – Updated: 2024-09-16 18:29

Title

Novel "ghost domain names" attack by updating almost expired delegation information

Summary

Severity

No CVSS data available.

CWE

Assigner

NLnet Labs

References

5 references

URL	Tags
https://www.nlnetlabs.nl/downloads/unbound/CVE-20…
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisory
https://security.gentoo.org/glsa/202212-02	vendor-advisory
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Impacted products

1 product

Vendor	Product	Version
NLnet Labs	Unbound	Affected: unspecified , ≤ 1.16.1 (custom)

Date Public

2022-08-01 00:00

Credits

We would like to thank Xiang Li from the Network and Information Security Lab of Tsinghua University for discovering and disclosing the vulnerability.

Show details on NVD website

JSON

To clipboard

{
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        "providerMetadata": {
          "dateUpdated": "2024-08-03T06:56:13.797Z",
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          {
            "name": "GLSA-202212-02",
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        ],
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      }
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          "vendor": "NLnet Labs",
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          "tags": [
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          "tags": [
            "vendor-advisory"
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        },
        {
          "name": "[debian-lts-announce] 20230329 [SECURITY] [DLA 3371-1] unbound security update",
          "tags": [
            "mailing-list"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html"
        }
      ],
      "title": "Novel \"ghost domain names\" attack by updating almost expired delegation information"
    }
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}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

OESA-2022-1836 (CVE-2022-30698)

CVE-2022-30698 (GCVE-0-2022-30698)

CVE-2022-30699 (GCVE-0-2022-30699)

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