[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fP1ZPcNzH8yTqZjJN3E5_DmXpyueIwyCJmKF4DEDiE2g":3,"g5a-risk:CVE-2021-43173":130},{"success":4,"data":5,"meta":128},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":53,"references":54,"referencesCount":68,"weaknesses":69,"weaknessesCount":53,"isActivelyExploited":84,"cisaInfo":26,"otxData":26,"relatedBlogPosts":85,"seoMetadata":86,"configurations":111,"relatedVendorCves":126,"notableEvents":127},"CVE-2021-43173","What is CVE-2021-43173?","In NLnet Labs Routinator prior to 0.10.2, a validation run can be delayed significantly by an RRDP repository by not answering but slowly drip-feeding bytes to keep the connection alive. This can be used to effectively stall validation. While Routinator has a configurable time-out value for RRDP connections, this time-out was only applied to individual read or write operations rather than the complete request. Thus, if an RRDP repository sends a little bit of data before that time-out expired, it can continuously extend the time it takes for the request to finish. Since validation will only continue once the update of an RRDP repository has concluded, this delay will cause validation to stall, 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.","In NLnet Labs Routinator prior to 0.10.2, a validation run can be delayed significantly by an RRDP repository by not answering but slowly drip-feeding bytes ...","2021-11-09T17:15:07.733","2022-08-09T13:42:01.12",7.5,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:H\u002FA:N",{"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":25,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":25,"ExploitCodeMaturity":26,"RemediationLevel":26,"ReportConfidence":26,"TemporalScore":26,"TemporalSeverity":26,"ConfidentialityRequirement":26,"IntegrityRequirement":26,"AvailabilityRequirement":23,"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":34,"AvailabilityImpact":23,"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:P\u002FA:N","PARTIAL",5,"MEDIUM",10,2.9,0.01493,[39,39,39,39,39,39,39],"High",[43,48],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"nlnetlabs","routinator","*","cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*",{"vendor":49,"product":50,"version":51,"criteria":52,"vulnerable":4},"debian","debian_linux","11.0","cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",2,[55,60,63],{"url":56,"source":57,"tags":58},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2021\u002Fdsa-5033","Debian",[59],"Third Party Advisory",{"url":61,"source":57,"tags":62},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2022\u002Fdsa-5041",[59],{"url":64,"source":65,"tags":66},"https:\u002F\u002Fwww.nlnetlabs.nl\u002Fdownloads\u002Froutinator\u002FCVE-2021-43172_CVE-2021-43173_CVE-2021-43174.txt","Nlnetlabs",[67],"Vendor Advisory",3,[70,78],{"id":71,"name":72,"description":73,"extendedDescription":74,"status":75,"abstraction":76,"structure":77},"CWE-400","Uncontrolled Resource Consumption","The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.","Limited resources include memory, file system storage, database connection pool entries, and CPU. If an attacker can trigger the allocation of these limited resources, but the number or size of the resources is not controlled, then the attacker could cause a denial of service that consumes all available resources. This would prevent valid users from accessing the product, and it could potentially have an impact on the surrounding environment. For example, a memory exhaustion attack against an application could slow down the application as well as its host operating system.\nThere are at least three distinct scenarios which can commonly lead to resource exhaustion:\nResource exhaustion problems are often result due to an incorrect implementation of the following situations:","Draft","Class","Simple",{"id":79,"name":80,"description":81,"extendedDescription":82,"status":83,"abstraction":76,"structure":77},"CWE-755","Improper Handling of Exceptional Conditions","The product does not handle or incorrectly handles an exceptional condition.","","Incomplete",false,[],{"title":87,"metaDescription":88,"keywords":89,"canonicalUrl":90,"structuredData":91},"What is CVE-2021-43173? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-43173, a high severity cyber security vulnerability from 2021. In NLnet Labs Routinator prior to 0.10.2, a validation run ...","CVE-2021-43173, CVE-2021-43173 vulnerability, CVE-2021-43173 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, debian security, routinator vulnerability, debian_linux vulnerability","\u002Fwhat-is\u002Fcve-2021-43173",{"@context":92,"@type":93,"headline":87,"description":88,"datePublished":10,"dateModified":11,"author":94,"publisher":98,"about":102,"mainEntityOfPage":106,"articleSection":109,"keywords":110},"https:\u002F\u002Fschema.org","TechArticle",{"@type":95,"name":96,"url":97},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":95,"name":96,"url":97,"logo":99},{"@type":100,"url":101},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":103,"name":6,"description":104,"additionalType":105},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":107,"@id":108},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-43173","Cybersecurity","CVE-2021-43173, CVE-2021-43173 vulnerability, CVE-2021-43173 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[112,120],{"Operator":26,"Negate":26,"Nodes":113},[114],{"Operator":115,"Negate":26,"CPEMatch":116},"OR",[117],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":118,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":119,"VersionEndIncluding":26},"708A1431-499D-4BE0-8032-877635B61029","0.10.2",{"Operator":26,"Negate":26,"Nodes":121},[122],{"Operator":115,"Negate":26,"CPEMatch":123},[124],{"Vulnerable":4,"Criteria":52,"MatchCriteriaID":125,"VersionStartExcluding":26,"VersionStartIncluding":26,"VersionEndExcluding":26,"VersionEndIncluding":26},"FA6FEEC2-9F11-4643-8827-749718254FED",[],[],{"lastModified":11,"cacheTime":129,"version":32},1792344936030,{"score":131,"band":132,"action":133,"scoredAt":134},46,"Medium","Plan remediation","2026-10-16T06:52:26.563946+00:00"]