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.
CVE-2022-30636 - Medium Severity Vulnerability
[mirror] Go supplementary cryptography libraries
Library home page: https://proxy.golang.org/golang.org/x/crypto/@v/v0.0.0-20210921155107-089bfa567519.zip
Path to dependency file: /go.mod
Path to vulnerable library: /go.mod
Dependency Hierarchy: - :x: **golang.org/x/crypto-v0.0.0-20210921155107-089bfa567519** (Vulnerable Library)
Found in HEAD commit: 296953fdf7b1766daf9ff2839a0e0a7b0d3f371e
Found in base branch: dev
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.
Publish Date: 2024-07-02
URL: CVE-2022-30636
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: None - Availability Impact: None
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: https://www.cve.org/CVERecord?id=CVE-2022-30636
Release Date: 2024-07-02
Fix Resolution: github.com/golang/crypto-v0.1.0
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