[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f3IVcI05XL54pZbzviCK1CbVP8VakXLEjB9UI0k0ZapE":3,"g5a-risk:CVE-2021-40847":286},{"success":4,"data":5,"meta":284},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":38,"epssPercentile":25,"epssTimeSeries":39,"severity":40,"affectedProducts":41,"affectedProductsCount":118,"references":119,"referencesCount":131,"weaknesses":132,"weaknessesCount":141,"isActivelyExploited":142,"cisaInfo":25,"otxData":25,"relatedBlogPosts":143,"seoMetadata":144,"configurations":169,"relatedVendorCves":282,"notableEvents":283},"CVE-2021-40847","What is CVE-2021-40847?","The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a MitM attack. While the parental controls themselves are not enabled by default on the routers, the Circle update daemon, circled, is enabled by default. This daemon connects to Circle and NETGEAR to obtain version information and updates to the circled daemon and its filtering database. However, database updates from NETGEAR are unsigned and downloaded via cleartext HTTP. As such, an attacker with the ability to perform a MitM attack on the device can respond to circled update requests with a crafted, compressed database file, the extraction of which gives the attacker the ability to overwrite executable files with attacker-controlled code. This affects R6400v2 1.0.4.106, R6700 1.0.2.16, R6700v3 1.0.4.106, R6900 1.0.2.16, R6900P 1.3.2.134, R7000 1.0.11.123, R7000P 1.3.2.134, R7850 1.0.5.68, R7900 1.0.4.38, R8000 1.0.4.68, and RS400 1.5.0.68.","The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a 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For example, in networking, packets can traverse many intermediary nodes from the source to the destination, whether across the internet, an internal network, the cloud, etc. Some actors might have privileged access to a network interface or any link along the channel, such as a router, but they might not be authorized to collect the underlying data. As a result, network traffic could be sniffed by adversaries, spilling security-critical data.\nApplicable communication channels are not limited to software products. Applicable channels include hardware-specific technologies such as internal hardware networks and external debug channels, supporting remote JTAG debugging. When mitigations are not applied to combat adversaries within the product's threat model, this weakness significantly lowers the difficulty of exploitation by such adversaries.\nWhen full communications are recorded or logged, such as with a packet dump, an adversary could attempt to obtain the dump long after the transmission has occurred and try to \"sniff\" the cleartext from the recorded communications in the dump itself. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.","Draft","Base","Simple",1,false,[],{"title":145,"metaDescription":146,"keywords":147,"canonicalUrl":148,"structuredData":149},"What is CVE-2021-40847? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-40847, a high severity cyber security vulnerability from 2021. The update process of the Circle Parental Control Service o...","CVE-2021-40847, CVE-2021-40847 vulnerability, CVE-2021-40847 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, netgear security, r6400v2_firmware vulnerability, r6400v2 vulnerability, r6700_firmware vulnerability, r6700 vulnerability, r6700v3_firmware vulnerability","\u002Fwhat-is\u002Fcve-2021-40847",{"@context":150,"@type":151,"headline":145,"description":146,"datePublished":10,"dateModified":11,"author":152,"publisher":156,"about":160,"mainEntityOfPage":164,"articleSection":167,"keywords":168},"https:\u002F\u002Fschema.org","TechArticle",{"@type":153,"name":154,"url":155},"Organization","Precursor 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