[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fv9yvVPJSFezIZl_asML0Q1YPrL9x4RCPHLT33lLBOlM":3,"g5a-risk:CVE-2017-17439":154},{"success":4,"data":5,"meta":152},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":39,"epssPercentile":15,"epssTimeSeries":40,"severity":41,"affectedProducts":42,"affectedProductsCount":53,"references":54,"referencesCount":97,"weaknesses":98,"weaknessesCount":107,"isActivelyExploited":108,"cisaInfo":15,"otxData":15,"relatedBlogPosts":109,"seoMetadata":110,"configurations":135,"relatedVendorCves":150,"notableEvents":151},"CVE-2017-17439","What is CVE-2017-17439?","In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client name or realm. The parser would unconditionally dereference NULL pointers in that case, leading to a segmentation fault. This is related to the _kdc_as_rep function in kdc\u002Fkerberos5.c and the der_length_visible_string function in lib\u002Fasn1\u002Fder_length.c.","In Heimdal through 7.4, remote unauthenticated attackers are able to crash the KDC by sending a crafted UDP packet containing empty data fields for client na...","2017-12-06T15:29:00.25","2025-04-20T01:37:25.86",7.5,"CVSS:3.0\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:N\u002FI:N\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":16,"CVSSMetricV2":29,"CVSSMetricV40":15},null,[17],{"Source":18,"Type":19,"CVSSData":20,"ExploitabilityScore":27,"ImpactScore":28},"nvd@nist.gov","Primary",{"Version":21,"VectorString":13,"AttackVector":22,"AttackComplexity":23,"PrivilegesRequired":24,"UserInteraction":24,"Scope":25,"ConfidentialityImpact":24,"IntegrityImpact":24,"AvailabilityImpact":26,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":15,"RemediationLevel":15,"ReportConfidence":15,"TemporalScore":15,"TemporalSeverity":15,"ConfidentialityRequirement":15,"IntegrityRequirement":15,"AvailabilityRequirement":15,"ModifiedAttackVector":15,"ModifiedAttackComplexity":15,"ModifiedPrivilegesRequired":15,"ModifiedUserInteraction":15,"ModifiedScope":15,"ModifiedConfidentialityImpact":15,"ModifiedIntegrityImpact":15,"ModifiedAvailabilityImpact":15,"EnvironmentalScore":15,"EnvironmentalSeverity":15},"3.0","NETWORK","LOW","NONE","UNCHANGED","HIGH",3.9,3.6,[30],{"Source":18,"Type":19,"CVSSData":31,"BaseSeverity":36,"ExploitabilityScore":37,"ImpactScore":38,"ACInsufInfo":15,"ObtainAllPrivilege":15,"ObtainUserPrivilege":15,"ObtainOtherPrivilege":15,"UserInteractionRequired":15},{"Version":32,"VectorString":33,"AccessVector":22,"AccessComplexity":23,"Authentication":24,"ConfidentialityImpact":24,"IntegrityImpact":24,"AvailabilityImpact":34,"BaseScore":35,"BaseSeverity":15,"Exploitability":15,"RemediationLevel":15,"ReportConfidence":15,"TemporalScore":15,"CollateralDamagePotential":15,"TargetDistribution":15,"ConfidentialityRequirement":15,"IntegrityRequirement":15,"AvailabilityRequirement":15,"EnvironmentalScore":15},"2.0","AV:N\u002FAC:L\u002FAu:N\u002FC:N\u002FI:N\u002FA:P","PARTIAL",5,"MEDIUM",10,2.9,0.03427,[39,39,39,39,39,39,39],"High",[43,48],{"vendor":44,"product":45,"version":46,"criteria":47,"vulnerable":4},"debian","debian_linux","9.0","cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",{"vendor":49,"product":50,"version":51,"criteria":52,"vulnerable":4},"heimdal_project","heimdal","*","cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*",2,[55,59,62,66,72,76,80,83,85,87,89,91,93,95],{"url":56,"source":57,"tags":58},"http:\u002F\u002Fh5l.org\u002Fadvisories.html?show=2017-12-08","H5l",[],{"url":60,"source":57,"tags":61},"http:\u002F\u002Fwww.h5l.org\u002Fpipermail\u002Fheimdal-announce\u002F2017-December\u002F000008.html",[],{"url":63,"source":57,"tags":64},"http:\u002F\u002Fwww.h5l.org\u002Fpipermail\u002Fheimdal-discuss\u002F2017-August\u002F000259.html",[65],"Third Party Advisory",{"url":67,"source":68,"tags":69},"https:\u002F\u002Fbugs.debian.org\u002Fcgi-bin\u002Fbugreport.cgi?bug=878144","Debian",[70,71,65],"Issue Tracking","Mailing List",{"url":73,"source":74,"tags":75},"https:\u002F\u002Fgithub.com\u002Fheimdal\u002Fheimdal\u002Fcommit\u002F1a6a6e462dc2ac6111f9e02c6852ddec4849b887","GitHub",[65],{"url":77,"source":74,"tags":78},"https:\u002F\u002Fgithub.com\u002Fheimdal\u002Fheimdal\u002Fissues\u002F353",[79,65],"Patch",{"url":81,"source":68,"tags":82},"https:\u002F\u002Fwww.debian.org\u002Fsecurity\u002F2017\u002Fdsa-4055",[65],{"url":56,"source":57,"tags":84},[],{"url":60,"source":57,"tags":86},[],{"url":63,"source":57,"tags":88},[65],{"url":67,"source":68,"tags":90},[70,71,65],{"url":73,"source":74,"tags":92},[65],{"url":77,"source":74,"tags":94},[79,65],{"url":81,"source":68,"tags":96},[65],14,[99],{"id":100,"name":101,"description":102,"extendedDescription":103,"status":104,"abstraction":105,"structure":106},"CWE-476","NULL Pointer Dereference","The product dereferences a pointer that it expects to be valid but is NULL.","","Stable","Base","Simple",1,false,[],{"title":111,"metaDescription":112,"keywords":113,"canonicalUrl":114,"structuredData":115},"What is CVE-2017-17439? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2017-17439, a high severity cyber security vulnerability from 2017. In Heimdal through 7.4, remote unauthenticated attackers ar...","CVE-2017-17439, CVE-2017-17439 vulnerability, CVE-2017-17439 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2017, CVSS score, exploit, patch, remediation, debian security, heimdal_project security, debian_linux vulnerability, heimdal vulnerability","\u002Fwhat-is\u002Fcve-2017-17439",{"@context":116,"@type":117,"headline":111,"description":112,"datePublished":10,"dateModified":11,"author":118,"publisher":122,"about":126,"mainEntityOfPage":130,"articleSection":133,"keywords":134},"https:\u002F\u002Fschema.org","TechArticle",{"@type":119,"name":120,"url":121},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":119,"name":120,"url":121,"logo":123},{"@type":124,"url":125},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":127,"name":6,"description":128,"additionalType":129},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":131,"@id":132},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2017-17439","Cybersecurity","CVE-2017-17439, CVE-2017-17439 vulnerability, CVE-2017-17439 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[136,143],{"Operator":15,"Negate":15,"Nodes":137},[138],{"Operator":139,"Negate":15,"CPEMatch":140},"OR",[141],{"Vulnerable":4,"Criteria":47,"MatchCriteriaID":142,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":15,"VersionEndIncluding":15},"DEECE5FC-CACF-4496-A3E7-164736409252",{"Operator":15,"Negate":15,"Nodes":144},[145],{"Operator":139,"Negate":15,"CPEMatch":146},[147],{"Vulnerable":4,"Criteria":52,"MatchCriteriaID":148,"VersionStartExcluding":15,"VersionStartIncluding":15,"VersionEndExcluding":15,"VersionEndIncluding":149},"6CFD4426-D9E3-4F45-8E0C-EC2DC17F5C00","7.4.0",[],[],{"lastModified":11,"cacheTime":153,"version":32},1792349769931,{"score":155,"band":156,"action":157,"scoredAt":158},47,"Medium","Plan remediation","2026-10-16T06:43:02.986874+00:00"]