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This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with `xn--` and should not be allowed to pattern match, but the wildcard check in curl could still check for `x*`, which would match even though the IDN name most likely contained nothing even resembling an `x`.","An improper certificate validation vulnerability exists in curl \u003Cv8.1.0 in the way it supports matching of wildcard patterns when listed as \"Subject 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Certificate Validation","The product does not validate, or incorrectly validates, a certificate.","When a certificate is invalid or malicious, it might allow an attacker to spoof a trusted entity by interfering in the communication path between the host and client. The product might connect to a malicious host while believing it is a trusted host, or the product might be deceived into accepting spoofed data that appears to originate from a trusted host.","Draft","Base","Simple",1,false,[],{"title":178,"metaDescription":179,"keywords":180,"canonicalUrl":181,"structuredData":182},"What is CVE-2023-28321? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2023-28321, a medium severity cyber security vulnerability from 2023. An improper certificate validation vulnerability exists i...","CVE-2023-28321, CVE-2023-28321 vulnerability, CVE-2023-28321 security, medium severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2023, CVSS score, exploit, patch, remediation, haxx security, debian security, fedoraproject security, netapp security, curl vulnerability, debian_linux vulnerability, fedora vulnerability, clustered_data_ontap vulnerability","\u002Fwhat-is\u002Fcve-2023-28321",{"@context":183,"@type":184,"headline":178,"description":179,"datePublished":10,"dateModified":11,"author":185,"publisher":189,"about":193,"mainEntityOfPage":197,"articleSection":200,"keywords":201},"https:\u002F\u002Fschema.org","TechArticle",{"@type":186,"name":187,"url":188},"Organization","Precursor 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