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This vulnerability is due to the incorrect handling of malformed BFD packets that are received on line cards where the BFD hardware offload feature is enabled. An attacker could exploit this vulnerability by sending a crafted IPv4 BFD packet to an affected device. A successful exploit could allow the attacker to cause line card exceptions or a hard reset, resulting in loss of traffic over that line card while the line card reloads.","A vulnerability in the bidirectional forwarding detection (BFD) hardware offload feature of Cisco IOS XR Software for Cisco ASR 9000 Series Aggregation Servi...","2023-03-09T22:15:52.2","2023-11-07T04:05:51.407",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":26,"CVSSMetricV40":26},[16,29],{"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,{"Source":30,"Type":31,"CVSSData":32,"ExploitabilityScore":27,"ImpactScore":36},"d1c1063e-7a18-46af-9102-31f8928bc633","Secondary",{"Version":20,"VectorString":33,"AttackVector":21,"AttackComplexity":22,"PrivilegesRequired":23,"UserInteraction":23,"Scope":34,"ConfidentialityImpact":23,"IntegrityImpact":23,"AvailabilityImpact":25,"BaseScore":35,"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},"CVSS:3.1\u002FAV:N\u002FAC:L\u002FPR:N\u002FUI:N\u002FS:C\u002FC:N\u002FI:N\u002FA:H","CHANGED",8.6,4,0.01046,[37,37,37,37,37,37,37],"High",[41,46,49,53,56,59,62,65,68,71,74,77,80,83],{"vendor":42,"product":43,"version":44,"criteria":45,"vulnerable":4},"cisco","ios_xr","*","cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*",{"vendor":42,"product":43,"version":47,"criteria":48,"vulnerable":4},"7.7","cpe:2.3:o:cisco:ios_xr:7.7:*:*:*:*:*:*:*",{"vendor":42,"product":50,"version":51,"criteria":52,"vulnerable":4},"asr_9000v-v2","-","cpe:2.3:h:cisco:asr_9000v-v2:-:*:*:*:*:*:*:*",{"vendor":42,"product":54,"version":51,"criteria":55,"vulnerable":4},"asr_9001","cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*",{"vendor":42,"product":57,"version":51,"criteria":58,"vulnerable":4},"asr_9006","cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*",{"vendor":42,"product":60,"version":51,"criteria":61,"vulnerable":4},"asr_9010","cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*",{"vendor":42,"product":63,"version":51,"criteria":64,"vulnerable":4},"asr_9901","cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*",{"vendor":42,"product":66,"version":51,"criteria":67,"vulnerable":4},"asr_9902","cpe:2.3:h:cisco:asr_9902:-:*:*:*:*:*:*:*",{"vendor":42,"product":69,"version":51,"criteria":70,"vulnerable":4},"asr_9903","cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:*",{"vendor":42,"product":72,"version":51,"criteria":73,"vulnerable":4},"asr_9904","cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*",{"vendor":42,"product":75,"version":51,"criteria":76,"vulnerable":4},"asr_9906","cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:*",{"vendor":42,"product":78,"version":51,"criteria":79,"vulnerable":4},"asr_9910","cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:*",{"vendor":42,"product":81,"version":51,"criteria":82,"vulnerable":4},"asr_9912","cpe:2.3:h:cisco:asr_9912:-:*:*:*:*:*:*:*",{"vendor":42,"product":84,"version":51,"criteria":85,"vulnerable":4},"asr_9922","cpe:2.3:h:cisco:asr_9922:-:*:*:*:*:*:*:*",14,[88],{"url":89,"source":90,"tags":91},"https:\u002F\u002Fsec.cloudapps.cisco.com\u002Fsecurity\u002Fcenter\u002Fcontent\u002FCiscoSecurityAdvisory\u002Fcisco-sa-bfd-XmRescbT","Cisco",[92],"Vendor Advisory",1,[95,103],{"id":96,"name":97,"description":98,"extendedDescription":99,"status":100,"abstraction":101,"structure":102},"CWE-119","Improper Restriction of Operations within the Bounds of a Memory Buffer","The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.","Certain languages allow direct addressing of memory locations and do not automatically ensure that these locations are valid for the memory buffer that is being referenced. This can cause read or write operations to be performed on memory locations that may be associated with other variables, data structures, or internal program data.","Stable","Class","Simple",{"id":104,"name":105,"description":106,"extendedDescription":107,"status":108,"abstraction":109,"structure":102},"CWE-805","Buffer Access with Incorrect Length Value","The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.","When the length value exceeds the size of the destination, a buffer overflow could occur.","Incomplete","Base",2,false,[],{"title":114,"metaDescription":115,"keywords":116,"canonicalUrl":117,"structuredData":118},"What is CVE-2023-20049? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2023-20049, a high severity cyber security vulnerability from 2023. 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