💣Exploit CVE-2022-30636 - httpTokenCacheKey uses path.Base to extract the ex

[Maksim]

CVE ID : CVE-2022-30636
Published : July 2, 2024, 8:15 p.m. | 5 hours, 7 minutes ago
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.
Severity: 0.0 | NA
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