[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f0EohsLOLz18mW-lJnUyvbsyNUdWKCXbfGVXeiCFTOX0":3,"g5a-risk:CVE-2021-43784":150},{"success":4,"data":5,"meta":148},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":48,"epssPercentile":27,"epssTimeSeries":49,"severity":51,"affectedProducts":52,"affectedProductsCount":63,"references":64,"referencesCount":93,"weaknesses":94,"weaknessesCount":103,"isActivelyExploited":104,"cisaInfo":27,"otxData":27,"relatedBlogPosts":105,"seoMetadata":106,"configurations":131,"relatedVendorCves":146,"notableEvents":147},"CVE-2021-43784","What is CVE-2021-43784?","runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc, netlink is used internally as a serialization system for specifying the relevant container configuration to the `C` portion of the code (responsible for the based namespace setup of containers). In all versions of runc prior to 1.0.3, the encoder did not handle the possibility of an integer overflow in the 16-bit length field for the byte array attribute type, meaning that a large enough malicious byte array attribute could result in the length overflowing and the attribute contents being parsed as netlink messages for container configuration. This vulnerability requires the attacker to have some control over the configuration of the container and would allow the attacker to bypass the namespace restrictions of the container by simply adding their own netlink payload which disables all namespaces. The main users impacted are those who allow untrusted images with untrusted configurations to run on their machines (such as with shared cloud infrastructure). runc version 1.0.3 contains a fix for this bug. As a workaround, one may try disallowing untrusted namespace paths from your container. It should be noted that untrusted namespace paths would allow the attacker to disable namespace protections entirely even in the absence of this bug.","runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc, netlink is used internally as a serialization sy...","2021-12-06T18:15:08.24","2024-02-19T03:15:07.33",5,"CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:L\u002FUI:N\u002FS:U\u002FC:L\u002FI:L\u002FA:L",{"CVSSMetricV31":15,"CVSSMetricV30":27,"CVSSMetricV2":39,"CVSSMetricV40":27},[16,30],{"Source":17,"Type":18,"CVSSData":19,"ExploitabilityScore":28,"ImpactScore":29},"nvd@nist.gov","Primary",{"Version":20,"VectorString":13,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":23,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","NETWORK","HIGH","LOW","NONE","UNCHANGED","MEDIUM",null,1.6,3.4,{"Source":31,"Type":32,"CVSSData":33,"ExploitabilityScore":37,"ImpactScore":38},"security-advisories@github.com","Secondary",{"Version":20,"VectorString":34,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":24,"Scope":35,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":23,"BaseScore":36,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":23,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"CVSS:3.1\u002FAV:N\u002FAC:H\u002FPR:L\u002FUI:N\u002FS:C\u002FC:L\u002FI:L\u002FA:L","CHANGED",6,1.8,3.7,[40],{"Source":17,"Type":18,"CVSSData":41,"BaseSeverity":26,"ExploitabilityScore":46,"ImpactScore":47,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":27},{"Version":42,"VectorString":43,"AccessVector":21,"AccessComplexity":26,"Authentication":44,"ConfidentialityImpact":45,"IntegrityImpact":45,"AvailabilityImpact":45,"BaseScore":36,"BaseSeverity":27,"Exploitability":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"CollateralDamagePotential":27,"TargetDistribution":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":27,"EnvironmentalScore":27},"2.0","AV:N\u002FAC:M\u002FAu:S\u002FC:P\u002FI:P\u002FA:P","SINGLE","PARTIAL",6.8,6.4,0.01803,[50,50,50,48,48,48,48],0.01795,"Medium",[53,58],{"vendor":54,"product":55,"version":56,"criteria":57,"vulnerable":4},"linuxfoundation","runc","*","cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*",{"vendor":59,"product":60,"version":61,"criteria":62,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",2,[65,71,76,79,82,85,90],{"url":66,"source":67,"tags":68},"https:\u002F\u002Fbugs.chromium.org\u002Fp\u002Fproject-zero\u002Fissues\u002Fdetail?id=2241","Chromium",[69,70],"Exploit","Third Party Advisory",{"url":72,"source":73,"tags":74},"https:\u002F\u002Fgithub.com\u002Fopencontainers\u002Frunc\u002Fcommit\u002F9c444070ec7bb83995dbc0185da68284da71c554","GitHub",[75,70],"Patch",{"url":77,"source":73,"tags":78},"https:\u002F\u002Fgithub.com\u002Fopencontainers\u002Frunc\u002Fcommit\u002Fd72d057ba794164c3cce9451a00b72a78b25e1ae",[75,70],{"url":80,"source":73,"tags":81},"https:\u002F\u002Fgithub.com\u002Fopencontainers\u002Frunc\u002Fcommit\u002Ff50369af4b571e358f20b139eea52d612eb55eed",[75,70],{"url":83,"source":73,"tags":84},"https:\u002F\u002Fgithub.com\u002Fopencontainers\u002Frunc\u002Fsecurity\u002Fadvisories\u002FGHSA-v95c-p5hm-xq8f",[75,70],{"url":86,"source":87,"tags":88},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2021\u002F12\u002Fmsg00005.html","Debian",[89],"Vendor Advisory",{"url":91,"source":87,"tags":92},"https:\u002F\u002Flists.debian.org\u002Fdebian-lts-announce\u002F2024\u002F02\u002Fmsg00005.html",[],7,[95],{"id":96,"name":97,"description":98,"extendedDescription":99,"status":100,"abstraction":101,"structure":102},"CWE-190","Integer Overflow or Wraparound","The product performs a calculation that can\n         produce an integer overflow or wraparound when the logic\n         assumes that the resulting value will always be larger than\n         the original value. This occurs when an integer value is\n         incremented to a value that is too large to store in the\n         associated representation. When this occurs, the value may\n         become a very small or negative number.","","Stable","Base","Simple",1,false,[],{"title":107,"metaDescription":108,"keywords":109,"canonicalUrl":110,"structuredData":111},"What is CVE-2021-43784? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-43784, a medium severity cyber security vulnerability from 2021. runc is a CLI tool for spawning and running containers on...","CVE-2021-43784, CVE-2021-43784 vulnerability, CVE-2021-43784 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, linuxfoundation security, debian security, runc vulnerability, debian_linux vulnerability","\u002Fwhat-is\u002Fcve-2021-43784",{"@context":112,"@type":113,"headline":107,"description":108,"datePublished":10,"dateModified":11,"author":114,"publisher":118,"about":122,"mainEntityOfPage":126,"articleSection":129,"keywords":130},"https:\u002F\u002Fschema.org","TechArticle",{"@type":115,"name":116,"url":117},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":115,"name":116,"url":117,"logo":119},{"@type":120,"url":121},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":123,"name":6,"description":124,"additionalType":125},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":127,"@id":128},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2021-43784","Cybersecurity","CVE-2021-43784, CVE-2021-43784 vulnerability, CVE-2021-43784 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[132,140],{"Operator":27,"Negate":27,"Nodes":133},[134],{"Operator":135,"Negate":27,"CPEMatch":136},"OR",[137],{"Vulnerable":4,"Criteria":57,"MatchCriteriaID":138,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":139,"VersionEndIncluding":27},"0EDE92EF-36C3-48E0-ADCF-FFAB45F903F2","1.0.3",{"Operator":27,"Negate":27,"Nodes":141},[142],{"Operator":135,"Negate":27,"CPEMatch":143},[144],{"Vulnerable":4,"Criteria":62,"MatchCriteriaID":145,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"DEECE5FC-CACF-4496-A3E7-164736409252",[],[],{"lastModified":11,"cacheTime":149,"version":42},1792375424127,{"score":151,"band":51,"action":152,"scoredAt":153},43,"Plan remediation","2026-10-16T06:52:38.414727+00:00"]