CVE-2022-34966
📋 TL;DR
CVE-2022-34966 is an HTML injection vulnerability in OpenTeknik OSSN v6.3 LTS that allows attackers to inject malicious HTML content via the location parameter. This affects all users of OSSN v6.3 LTS who have the vulnerable component accessible. The vulnerability could lead to phishing attacks, session hijacking, or defacement.
💻 Affected Systems
- OpenTeknik OSSN (Open Source Social Network)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could inject malicious scripts leading to session hijacking, credential theft, or complete account compromise through phishing attacks.
Likely Case
Attackers inject HTML to create phishing forms, deface pages, or redirect users to malicious sites.
If Mitigated
With proper input validation and output encoding, the impact is limited to minor display issues.
🎯 Exploit Status
Exploitation requires authentication to access the home endpoint. The vulnerability is simple to exploit once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after v6.3 LTS (check latest releases)
Vendor Advisory: https://github.com/opensource-socialnetwork/opensource-socialnetwork/releases
Restart Required: No
Instructions:
1. Backup your OSSN installation and database. 2. Download the latest OSSN release from GitHub. 3. Replace the vulnerable files with patched versions. 4. Clear any caches if applicable.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to sanitize the location parameter before processing.
Modify the PHP code handling the location parameter to use htmlspecialchars() or similar sanitization functions.
WAF Rule
allImplement a web application firewall rule to block malicious HTML injection attempts.
Add WAF rule to detect and block patterns like <script>, <iframe>, javascript: in location parameter.
🧯 If You Can't Patch
- Restrict access to the OSSN home endpoint using network ACLs or authentication requirements.
- Implement Content Security Policy (CSP) headers to mitigate script execution from injected content.
🔍 How to Verify
Check if Vulnerable:
Test by accessing the home endpoint with a location parameter containing HTML payload (e.g., location=<script>alert('test')</script>) and check if it executes.Check Version:
Check the OSSN version in the admin panel or review the version file in the installation directory.Verify Fix Applied:
After patching, repeat the test with the same payload; the HTML should be properly encoded and not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /ossn/home with HTML tags in parameters
- Multiple failed injection attempts in web server logs
Network Indicators:
- HTTP requests containing script tags or HTML entities in the location parameter
SIEM Query:
source="web_server" AND (url_path="/ossn/home" AND (param="location" AND value CONTAINS "<script>" OR value CONTAINS "javascript:"))🔗 References
- https://github.com/opensource-socialnetwork/opensource-socialnetwork/releases/tag/6.3
- https://grimthereaperteam.medium.com/cve-2022-34966-ossn-6-3-lts-html-injection-vulnerability-at-location-parameter-3fe791dd22c6
- https://www.opensource-socialnetwork.org/
- https://www.openteknik.com/contact?channel=ossn
- https://github.com/opensource-socialnetwork/opensource-socialnetwork/releases/tag/6.3
- https://grimthereaperteam.medium.com/cve-2022-34966-ossn-6-3-lts-html-injection-vulnerability-at-location-parameter-3fe791dd22c6
- https://www.opensource-socialnetwork.org/
- https://www.openteknik.com/contact?channel=ossn
