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
github.com/cloudflare/cfssl-1.3.2
CFSSL: Cloudflare's PKI and TLS toolkit
Dependency Hierarchy: - :x: **github.com/cloudflare/cfssl-1.3.2** (Vulnerable Library)
github.com/golang/crypto-v0.0.0-20180904163835-0709b304e793
[mirror] Go supplementary cryptography libraries
Library home page: https://proxy.golang.org/github.com/golang/crypto/@v/v0.0.0-20180904163835-0709b304e793.zip
Dependency Hierarchy: - :x: **github.com/golang/crypto-v0.0.0-20180904163835-0709b304e793** (Vulnerable Library)
Found in HEAD commit: cd87321da747fd23c6285641b10b0432943dfed6
Found in base branch: master
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
Step up your Open Source Security Game with Mend here