CVE-2022-30636 Information

Description

httpTokenCacheKey uses path.Base to extract the expected HTTP-01 token value to lookup in the DirCache implementation. On Windows path.Base acts differently to filepath.Base since Windows uses a different path separator (\ vs. /) allowing a user to provide a relative path i.e. .well-known/acme-challenge/....\asd becomes ....\asd. The extracted path is then suffixed with +http-01 joined with the cache directory and opened. Since the controlled path is suffixed with +http-01 before opening the impact of this is significantly limited since it only allows reading arbitrary files on the system if and only if they have this suffix.

Reference

https://go.dev/cl/408694 https://go.dev/issue/53082 https://pkg.go.dev/vuln/GO-2024-2961