Exposure of Sensitive Information via Arbitrary System Path Lookup in h2oai/h2o-3

In h2oai/h2o-3 version 3.40.0.4, an exposure of sensitive information vulnerability exists due to an arbitrary system path lookup feature. This vulnerability allows any remote user to view full paths in the entire file system where h2o-3 is hosted. Specifically, the issue resides in the Typeahead API call, which when requested with a typeahead lookup of '/', exposes the root filesystem including directories such as /home, /usr, /bin, among others. This vulnerability could allow attackers to explore the entire filesystem, and when combined with a Local File Inclusion (LFI) vulnerability, could make exploitation of the server trivial.

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对路径名的限制不恰当(路径遍历)

h2o 信息泄露漏洞

h2o是新一代的 HTTP 服务器。与老一代的 HTTP 服务器相比，它不仅速度非常快，而且还为最终用户提供了更快的响应。 h2o-3 3.40.0.4版本存在信息泄露漏洞，该漏洞源于存在敏感信息暴露漏洞，允许任何远程用户查看托管整个文件系统中的完整路径。

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