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

Quick assessment

Affected
golang.org/x/crypto golang.org/x/crypto/acme/autocert
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于存在有限的目录遍历，允许读取系统上的任意文件。

AI Predicted 5.5 Difficulty: Easy EPSS 0.64% · P48

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2022-30636

Vulnerability Information
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Vulnerability Title
Limited directory traversal vulnerability on Windows in golang.org/x/crypto
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于存在有限的目录遍历，允许读取系统上的任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
golang.org/x/crypto golang.org/x/crypto/acme/autocert 0 ~ 0.0.0-20220525230936-793ad666bf5e -

II. Public POCs for CVE-2022-30636

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III. Intelligence Information for CVE-2022-30636

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Other References for CVE-2022-30636 (2)

IV. Related Vulnerabilities

Same vendor: golang.org/x/crypto

V. Comments for CVE-2022-30636

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