CVE-2022-30636 Limited directory traversal vulnerability on Windows in golang.org/x/crypto

2024-07-0219:51:46

www.cve.org

cve-2022-30636

vulnerability

directory traversal

windows

golang.org/x/crypto

http-01

path.base

dircache

EPSS

Percentile

15.8%

JSON

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.

CNA Affected

[
  {
    "vendor": "golang.org/x/crypto",
    "product": "golang.org/x/crypto/acme/autocert",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "golang.org/x/crypto/acme/autocert",
    "versions": [
      {
        "version": "0",
        "lessThan": "0.0.0-20220525230936-793ad666bf5e",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "platforms": [
      "windows"
    ],
    "programRoutines": [
      {
        "name": "DirCache.Get"
      },
      {
        "name": "DirCache.Put"
      },
      {
        "name": "DirCache.Delete"
      },
      {
        "name": "HostWhitelist"
      },
      {
        "name": "Manager.GetCertificate"
      },
      {
        "name": "Manager.Listener"
      },
      {
        "name": "NewListener"
      },
      {
        "name": "listener.Accept"
      },
      {
        "name": "listener.Close"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

References

go.dev/cl/408694

go.dev/issue/53082

pkg.go.dev/vuln/GO-2024-2961

EPSS

Percentile

15.8%

JSON

Related for CVELIST:CVE-2022-30636