[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbIpAJWfNmoPz-DTmNeSiUQhbENYVt5kFfxOAsLajsuw":3,"g5a-risk:CVE-2021-43172":112},{"success":4,"data":5,"meta":110},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":26,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":48,"references":49,"referencesCount":48,"weaknesses":55,"weaknessesCount":71,"isActivelyExploited":72,"cisaInfo":26,"otxData":26,"relatedBlogPosts":73,"seoMetadata":74,"configurations":99,"relatedVendorCves":108,"notableEvents":109},"CVE-2021-43172","What is CVE-2021-43172?","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.","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,...","2021-11-09T17:15:07.663","2022-04-25T18:06:58.897",7.5,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":26,"CVSSMetricV2":29,"CVSSMetricV40":26},[16],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":24,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":25,"ModifiedAttackVector":26,"ModifiedAttackComplexity":26,"ModifiedPrivilegesRequired":26,"ModifiedUserInteraction":26,"ModifiedScope":26,"ModifiedConfidentialityImpact":26,"ModifiedIntegrityImpact":26,"ModifiedAvailabilityImpact":26,"EnvironmentalScore":26,"EnvironmentalSeverity":26},"3.1","NETWORK","LOW","NONE","UNCHANGED","HIGH",null,3.9,3.6,[30],{"Source":17,"Type":18,"CVSSData":31,"BaseSeverity":36,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":26,"ObtainAllPrivilege":26,"ObtainUserPrivilege":26,"ObtainOtherPrivilege":26,"UserInteractionRequired":26},{"Version":32,"VectorString":33,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":34,"BaseScore":35,"BaseSeverity":26,"Exploitability":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"CollateralDamagePotential":26,"TargetDistribution":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":26,"EnvironmentalScore":26},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:N\u002FA:P","PARTIAL",5,"MEDIUM",10,2.9,0.01261,[39,39,39,39,39,39,39],"High",[43],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"nlnetlabs","routinator","*","cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*",1,[50],{"url":51,"source":52,"tags":53},"https:\u002F\u002Fwww.nlnetlabs.nl\u002Fdownloads\u002Froutinator\u002FCVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt","Nlnetlabs",[54],"Vendor Advisory",[56,64],{"id":57,"name":58,"description":59,"extendedDescription":60,"status":61,"abstraction":62,"structure":63},"CWE-835","Loop with Unreachable Exit Condition ('Infinite Loop')","The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.","If the loop can be influenced by an attacker, this weakness could allow attackers to consume excessive resources such as CPU or memory.","Incomplete","Base","Simple",{"id":65,"name":66,"description":67,"extendedDescription":68,"status":69,"abstraction":70,"structure":63},"CWE-674","Uncontrolled Recursion","The product does not properly control the amount of recursion that takes place,  consuming excessive resources, such as allocated memory or the program stack.","","Draft","Class",2,false,[],{"title":75,"metaDescription":76,"keywords":77,"canonicalUrl":78,"structuredData":79},"What is CVE-2021-43172? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-43172, a high severity cyber security vulnerability from 2021. NLnet Labs Routinator prior to 0.10.2 happily processes a c...","CVE-2021-43172, CVE-2021-43172 vulnerability, CVE-2021-43172 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, nlnetlabs security, routinator vulnerability","\u002Fwhat-is\u002Fcve-2021-43172",{"@context":80,"@type":81,"headline":75,"description":76,"datePublished":10,"dateModified":11,"author":82,"publisher":86,"about":90,"mainEntityOfPage":94,"articleSection":97,"keywords":98},"https:\u002F\u002Fschema.org","TechArticle",{"@type":83,"name":84,"url":85},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":83,"name":84,"url":85,"logo":87},{"@type":88,"url":89},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":91,"name":6,"description":92,"additionalType":93},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":95,"@id":96},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-43172","Cybersecurity","CVE-2021-43172, CVE-2021-43172 vulnerability, CVE-2021-43172 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[100],{"Operator":26,"Negate":26,"Nodes":101},[102],{"Operator":103,"Negate":26,"CPEMatch":104},"OR",[105],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":106,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":107,"VersionEndIncluding":26},"708A1431-499D-4BE0-8032-877635B61029","0.10.2",[],[],{"lastModified":11,"cacheTime":111,"version":32},1792344938078,{"score":113,"band":114,"action":115,"scoredAt":116},46,"Medium","Plan remediation","2026-10-16T06:52:26.563531+00:00"]