cve-2022-30698
Vulnerability from cvelistv5
Published
2022-08-01 14:13
Modified
2024-09-16 19:35
Severity ?
Summary
Novel "ghost domain names" attack by introducing subdomain delegations
Impacted products
NLnet LabsUnbound
Show details on NVD website


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            "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt"
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        "title": "CVE Program Container"
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    "cna": {
      "affected": [
        {
          "product": "Unbound",
          "vendor": "NLnet Labs",
          "versions": [
            {
              "lessThanOrEqual": "1.16.1",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
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      ],
      "credits": [
        {
          "lang": "en",
          "value": "We would like to thank Xiang Li from the Network and Information Security Lab of Tsinghua University for discovering and disclosing the vulnerability."
        }
      ],
      "datePublic": "2022-08-01T00:00:00",
      "descriptions": [
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          "lang": "en",
          "value": "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\u0027s 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."
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        "orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
        "shortName": "NLnet Labs"
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      "references": [
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          "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00024.html"
        }
      ],
      "title": "Novel \"ghost domain names\" attack by introducing subdomain delegations"
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  "cveMetadata": {
    "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
    "assignerShortName": "NLnet Labs",
    "cveId": "CVE-2022-30698",
    "datePublished": "2022-08-01T14:13:44.911318Z",
    "dateReserved": "2022-05-13T00:00:00",
    "dateUpdated": "2024-09-16T19:35:09.568Z",
    "state": "PUBLISHED"
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