[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fRCU3YMvMKQsj_BIaDhasDbk6qqGhZjcppECxP4bNqls":3,"g5a-risk:CVE-2020-12883":114},{"success":4,"data":5,"meta":112},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":40,"epssPercentile":27,"epssTimeSeries":41,"severity":42,"affectedProducts":43,"affectedProductsCount":49,"references":50,"referencesCount":65,"weaknesses":66,"weaknessesCount":49,"isActivelyExploited":75,"cisaInfo":27,"otxData":27,"relatedBlogPosts":76,"seoMetadata":77,"configurations":102,"relatedVendorCves":110,"notableEvents":111},"CVE-2020-12883","What is CVE-2020-12883?","Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function sn_coap_parser_options_parse() parses CoAP input linearly using a while loop. Once an option is parsed in a loop, the current point (*packet_data_pptr) is increased correspondingly. The pointer is restricted by the size of the received buffer, as well as by the option delta and option length bytes. The actual input packet length is not verified against the number of bytes read when processing the option extended delta and the option extended length. Moreover, the calculation of the message_left variable, in the case of non-extended option deltas, is incorrect and indicates more data left for processing than provided in the function input. All of these lead to heap-based or stack-based memory location read access that is outside of the intended boundary of the buffer. Depending on the platform-specific memory management mechanisms, it can lead to processing of unintended inputs or system memory access violation errors.","Buffer over-reads were discovered in the CoAP library in Arm Mbed OS 5.15.3. The CoAP parser is responsible for parsing received CoAP packets. The function s...","2020-06-18T19:15:09.893","2021-07-21T11:39:23.747",9.1,"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:U\u002FC:H\u002FI:N\u002FA:H",{"CVSSMetricV31":15,"CVSSMetricV30":27,"CVSSMetricV2":30,"CVSSMetricV40":27},[16],{"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":23,"Scope":24,"ConfidentialityImpact":25,"IntegrityImpact":23,"AvailabilityImpact":25,"BaseScore":12,"BaseSeverity":26,"ExploitCodeMaturity":27,"RemediationLevel":27,"ReportConfidence":27,"TemporalScore":27,"TemporalSeverity":27,"ConfidentialityRequirement":27,"IntegrityRequirement":27,"AvailabilityRequirement":25,"ModifiedAttackVector":27,"ModifiedAttackComplexity":27,"ModifiedPrivilegesRequired":27,"ModifiedUserInteraction":27,"ModifiedScope":27,"ModifiedConfidentialityImpact":27,"ModifiedIntegrityImpact":27,"ModifiedAvailabilityImpact":27,"EnvironmentalScore":27,"EnvironmentalSeverity":27},"3.1","NETWORK","LOW","NONE","UNCHANGED","HIGH","CRITICAL",null,3.9,5.2,[31],{"Source":17,"Type":18,"CVSSData":32,"BaseSeverity":37,"ExploitabilityScore":38,"ImpactScore":39,"ACInsufInfo":27,"ObtainAllPrivilege":27,"ObtainUserPrivilege":27,"ObtainOtherPrivilege":27,"UserInteractionRequired":27},{"Version":33,"VectorString":34,"AccessVector":21,"AccessComplexity":22,"Authentication":23,"ConfidentialityImpact":35,"IntegrityImpact":23,"AvailabilityImpact":35,"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:L\u002FAu:N\u002FC:P\u002FI:N\u002FA:P","PARTIAL",6.4,"MEDIUM",10,4.9,0.01783,[40,40,40,40,40,40,40],"Critical",[44],{"vendor":45,"product":46,"version":47,"criteria":48,"vulnerable":4},"arm","mbed_os","5.15.3","cpe:2.3:o:arm:mbed_os:5.15.3:*:*:*:*:*:*:*",1,[51,56,59,62],{"url":52,"source":53,"tags":54},"https:\u002F\u002Fgithub.com\u002FARMmbed\u002Fmbed-coap\u002Fpull\u002F116","GitHub",[55],"Third Party Advisory",{"url":57,"source":53,"tags":58},"https:\u002F\u002Fgithub.com\u002FARMmbed\u002Fmbed-os\u002Fissues\u002F12925",[55],{"url":60,"source":53,"tags":61},"https:\u002F\u002Fgithub.com\u002FARMmbed\u002Fmbed-os\u002Fissues\u002F12926",[55],{"url":63,"source":53,"tags":64},"https:\u002F\u002Fgithub.com\u002FARMmbed\u002Fmbed-os\u002Fissues\u002F12927",[55],4,[67],{"id":68,"name":69,"description":70,"extendedDescription":71,"status":72,"abstraction":73,"structure":74},"CWE-125","Out-of-bounds Read","The product reads data past the end, or before the beginning, of the intended buffer.","","Draft","Base","Simple",false,[],{"title":78,"metaDescription":79,"keywords":80,"canonicalUrl":81,"structuredData":82},"What is CVE-2020-12883? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2020-12883, a critical severity cyber security vulnerability from 2020. Buffer over-reads were discovered in the CoAP library i...","CVE-2020-12883, CVE-2020-12883 vulnerability, CVE-2020-12883 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2020, CVSS score, exploit, patch, remediation, arm security, mbed_os vulnerability","\u002Fwhat-is\u002Fcve-2020-12883",{"@context":83,"@type":84,"headline":78,"description":79,"datePublished":10,"dateModified":11,"author":85,"publisher":89,"about":93,"mainEntityOfPage":97,"articleSection":100,"keywords":101},"https:\u002F\u002Fschema.org","TechArticle",{"@type":86,"name":87,"url":88},"Organization","Precursor Intelligence","https:\u002F\u002Fprecursorintelligence.com",{"@type":86,"name":87,"url":88,"logo":90},{"@type":91,"url":92},"ImageObject","https:\u002F\u002Fprecursorintelligence.com\u002Fimg\u002Flogos\u002Feplogo.png",{"@type":94,"name":6,"description":95,"additionalType":96},"Thing","Cybersecurity Vulnerability","https:\u002F\u002Fschema.org\u002FSoftwareBug",{"@type":98,"@id":99},"WebPage","https:\u002F\u002Fprecursorintelligence.com\u002Fwhat-is\u002Fcve-2020-12883","Cybersecurity","CVE-2020-12883, CVE-2020-12883 vulnerability, CVE-2020-12883 security, critical severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research",[103],{"Operator":27,"Negate":27,"Nodes":104},[105],{"Operator":106,"Negate":27,"CPEMatch":107},"OR",[108],{"Vulnerable":4,"Criteria":48,"MatchCriteriaID":109,"VersionStartExcluding":27,"VersionStartIncluding":27,"VersionEndExcluding":27,"VersionEndIncluding":27},"B314FCEF-12B7-4510-AC5E-12D3574E3E68",[],[],{"lastModified":11,"cacheTime":113,"version":33},1792269101711,{"score":115,"band":116,"action":117,"scoredAt":118},54,"Medium","Plan remediation","2026-10-16T06:48:51.929335+00:00"]