CVE-2021-43172

{"containers": {"cna": {"affected": [{"product": "Routinator", "vendor": "NLnet Labs", "versions": [{"lessThanOrEqual": "0.10.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "credits": [{"lang": "en", "value": "We would like to thank Koen van Hove for the discovery."}], "datePublic": "2021-11-09T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "NLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to never finish a validation run. In RPKI, a CA can choose the RRDP repository it wishes to publish its data in. By continuously generating a new child CA that only consists of another CA using a different RRDP repository, a malicious CA can create a chain of CAs of de-facto infinite length. Routinator prior to version 0.10.2 did not contain a limit on the length of such a chain and will therefore continue to process this chain forever. As a result, the validation run will never finish, leading to Routinator continuing to serve the old data set or, if in the initial validation run directly after starting, never serve any data at all."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-674", "description": "CWE-674: Uncontrolled Recursion", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-11-09T16:41:39.000Z", "orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "shortName": "NLnet Labs"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt"}], "title": "Infinite length chain of RRDP repositories", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sep@nlnetlabs.nl", "DATE_PUBLIC": "2021-11-09T14:00:00.000Z", "ID": "CVE-2021-43172", "STATE": "PUBLIC", "TITLE": "Infinite length chain of RRDP repositories"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Routinator", "version": {"version_data": [{"version_affected": "<=", "version_value": "0.10.1"}]}}]}, "vendor_name": "NLnet Labs"}]}}, "credit": [{"lang": "eng", "value": "We would like to thank Koen van Hove for the discovery."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "NLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to never finish a validation run. In RPKI, a CA can choose the RRDP repository it wishes to publish its data in. By continuously generating a new child CA that only consists of another CA using a different RRDP repository, a malicious CA can create a chain of CAs of de-facto infinite length. Routinator prior to version 0.10.2 did not contain a limit on the length of such a chain and will therefore continue to process this chain forever. As a result, the validation run will never finish, leading to Routinator continuing to serve the old data set or, if in the initial validation run directly after starting, never serve any data at all."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-674: Uncontrolled Recursion"}]}]}, "references": {"reference_data": [{"name": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt", "refsource": "MISC", "url": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:47:13.607Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt"}]}]}, "cveMetadata": {"assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6", "assignerShortName": "NLnet Labs", "cveId": "CVE-2021-43172", "datePublished": "2021-11-09T16:41:39.328Z", "dateReserved": "2021-11-01T00:00:00.000Z", "dateUpdated": "2024-09-16T17:03:32.303Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Routinator", "vendor": "NLnet Labs", "versions": [{"lessThanOrEqual": "0.10.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "sep@nlnetlabs.nl"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*", "matchCriteriaId": "708A1431-499D-4BE0-8032-877635B61029", "versionEndExcluding": "0.10.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "NLnet Labs Routinator prior to 0.10.2 happily processes a chain of RRDP repositories of infinite length causing it to never finish a validation run. In RPKI, a CA can choose the RRDP repository it wishes to publish its data in. By continuously generating a new child CA that only consists of another CA using a different RRDP repository, a malicious CA can create a chain of CAs of de-facto infinite length. Routinator prior to version 0.10.2 did not contain a limit on the length of such a chain and will therefore continue to process this chain forever. As a result, the validation run will never finish, leading to Routinator continuing to serve the old data set or, if in the initial validation run directly after starting, never serve any data at all."}, {"lang": "es", "value": "NLnet Labs Routinator versiones anteriores a 0.10.2 procesa felizmente una cadena de repositorios RRDP de longitud infinita causando que nunca termine una ejecuci\u00f3n de comprobaci\u00f3n. En RPKI, una CA puede elegir el repositorio RRDP en el que desea publicar sus datos. Al generar continuamente una nueva CA hija que s\u00f3lo consiste en otra CA que usa un repositorio RRDP diferente, una CA maliciosa puede crear una cadena de CAs de longitud infinita de facto. Routinator versiones anteriores a 0.10.2, no conten\u00eda un l\u00edmite en la longitud de dicha cadena y por lo tanto continuar\u00e1 procesando esta cadena para siempre. Como resultado, la ejecuci\u00f3n de comprobaci\u00f3n nunca terminar\u00e1, conllevando a que Routinator contin\u00fae sirviendo el antiguo conjunto de datos o, si en la ejecuci\u00f3n de comprobaci\u00f3n inicial directamente despu\u00e9s de comenzar, nunca sirva ning\u00fan dato"}], "id": "CVE-2021-43172", "lastModified": "2026-06-17T04:10:34.900", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-11-09T17:15:07.663", "references": [{"source": "sep@nlnetlabs.nl", "tags": ["Vendor Advisory"], "url": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.nlnetlabs.nl/downloads/routinator/CVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt"}], "sourceIdentifier": "sep@nlnetlabs.nl", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-674"}], "source": "sep@nlnetlabs.nl", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-835"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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