CVE-2022-30636

Limited directory traversal vulnerability on Windows in golang.org/x/crypto

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.

7.5

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.20%

Affected: golang.org/x/crypto golang.org/x/crypto/acme/autocert

References

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

Frequently Asked Questions

What is the severity of CVE-2022-30636?: CVE-2022-30636 has been scored as a high severity vulnerability.
How to fix CVE-2022-30636?: To fix CVE-2022-30636, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-30636 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-30636 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-30636?: CVE-2022-30636 affects golang.org/x/crypto golang.org/x/crypto/acme/autocert.

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