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CVE-2021-43800— Asset directory traversal with some storage modules on Windows

Quick assessment

Affected
Requarks wiki
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.

Wiki.js是Requarks.io团队的一套基于Node.js并使用JavaScript语言编写的开源Wiki软件。 Wiki.js 2.5.254 之前存在路径遍历漏洞，当在 Windows 主机上启用具有本地资产缓存获取的存储模块时，可以在 Wiki.js 上下文之外进行目录遍历。恶意用户可以通过制作允许目录遍历的特殊 URL 来潜在地读取文件系统上的任何文件。

CVSS 7.5 · High EPSS 1.74% · P76

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-43800

Vulnerability Information
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Vulnerability Title
Asset directory traversal with some storage modules on Windows
Source: CVE Program / CVE List V5
Vulnerability Description
Wiki.js is a wiki app built on Node.js. Prior to version 2.5.254, directory traversal outside of Wiki.js context is possible when a storage module with local asset cache fetching is enabled on a Windows host. A malicious user can potentially read any file on the file system by crafting a special URL that allows for directory traversal. This is only possible on a Wiki.js server running on Windows, when a storage module implementing local asset cache (e.g Local File System or Git) is enabled and that no web application firewall solution (e.g. cloudflare) strips potentially malicious URLs. Commit number 414033de9dff66a327e3f3243234852f468a9d85 fixes this vulnerability by sanitizing the path before it is passed on to the storage module. The sanitization step removes any windows directory traversal sequences from the path. As a workaround, disable any storage module with local asset caching capabilities (Local File System, Git).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Wiki.js 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wiki.js是Requarks.io团队的一套基于Node.js并使用JavaScript语言编写的开源Wiki软件。 Wiki.js 2.5.254 之前存在路径遍历漏洞，当在 Windows 主机上启用具有本地资产缓存获取的存储模块时，可以在 Wiki.js 上下文之外进行目录遍历。恶意用户可以通过制作允许目录遍历的特殊 URL 来潜在地读取文件系统上的任何文件。
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
Requarks wiki < 2.5.254 -

II. Public POCs for CVE-2021-43800

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III. Intelligence Information for CVE-2021-43800

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Patches & Fixes for CVE-2021-43800 (1)

Vendor Advisories for CVE-2021-43800 (1)

Other References for CVE-2021-43800 (1)

IV. Related Vulnerabilities

Same product: wiki
Same vendor: Requarks
Same weakness: CWE-22

V. Comments for CVE-2021-43800

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