[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f54t6OXGy5lFNC97Fl31e_b1H_mMyY9CKoy1JFeajUfM":3,"g5a-risk:CVE-2021-42550":216},{"success":4,"data":5,"meta":214},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":43,"epssPercentile":26,"epssTimeSeries":44,"severity":45,"affectedProducts":46,"affectedProductsCount":75,"references":76,"referencesCount":75,"weaknesses":111,"weaknessesCount":120,"isActivelyExploited":121,"cisaInfo":26,"otxData":26,"relatedBlogPosts":122,"seoMetadata":123,"configurations":148,"relatedVendorCves":212,"notableEvents":213},"CVE-2021-42550","What is CVE-2021-42550?","In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.","In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration 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However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security -- which is a dangerous security assumption.\nData that is untrusted can not be trusted to be well-formed.\nWhen developers place no restrictions on \"gadget chains,\" or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.","Draft","Base","Simple",1,false,[],{"title":124,"metaDescription":125,"keywords":126,"canonicalUrl":127,"structuredData":128},"What is CVE-2021-42550? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-42550, a medium severity cyber security vulnerability from 2021. 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