In short
- CVE-2022-30636 is a HIGH (CVSS 7.5) vulnerability affecting golang.org/x/crypto.
- Chance of exploitation in the next 30 days (EPSS): 0.64%, higher than 50.5% of all vulnerabilities.
- Fix: update to 0.0.0-20220525230936-793ad666bf5e or later.
| Package | Affected versions | Patched versions |
|---|
| golang.org/x/crypto Go | < 0.0.0-20220525230936-793ad666bf5e
| 0.0.0-20220525230936-793ad666bf5e
|
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.
NVD 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.
More vulnerabilities in golang.org/x/crypto
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