CVE-2023-28321— curl 信任管理问题漏洞

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An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. 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`.

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证书验证不恰当

curl 信任管理问题漏洞

curl是一款用于从服务器传输数据或向服务器传输数据的工具。 curl 存在安全漏洞，该漏洞源于IDN 通配符匹配可能导致不正确的证书验证。

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