CVE-2022-23633
📋 TL;DR
CVE-2022-23633 is a data leakage vulnerability in Ruby on Rails Action Pack where response bodies may not be properly closed, causing thread local state to persist between requests. This allows sensitive data from one user's request to leak to subsequent requests from other users. All Rails applications using affected versions are vulnerable.
💻 Affected Systems
- Ruby on Rails
📦 What is this software?
Rails by Rubyonrails
Rails by Rubyonrails
Rails by Rubyonrails
Rails by Rubyonrails
⚠️ Risk & Real-World Impact
Worst Case
Sensitive user data (authentication tokens, personal information, session data) from one user is exposed to other users in subsequent requests, potentially leading to account takeover and privacy violations.
Likely Case
Intermittent data leakage between user sessions, exposing fragments of sensitive information that could be pieced together by attackers.
If Mitigated
With proper patching or workarounds, no data leakage occurs between requests.
🎯 Exploit Status
Exploitation requires specific conditions where response bodies aren't closed, but no authentication is needed to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Rails 7.0.2.1, 6.1.4.5, 6.0.4.5, or 5.2.6.1
Vendor Advisory: https://github.com/rails/rails/security/advisories/GHSA-wh98-p28r-vrc9
Restart Required: Yes
Instructions:
1. Update Gemfile to specify patched Rails version. 2. Run 'bundle update rails'. 3. Restart application server. 4. Test application functionality.
🔧 Temporary Workarounds
Middleware Workaround
allAdd middleware to ensure response bodies are properly closed between requests
Add middleware as described in GHSA-wh98-p28r-vrc9 advisory
🧯 If You Can't Patch
- Implement the middleware workaround from the GitHub advisory
- Isolate affected applications behind additional authentication layers
🔍 How to Verify
Check if Vulnerable:
Check Rails version with 'rails --version' or examine Gemfile.lock for rails gem versionCheck Version:
rails --versionVerify Fix Applied:
Confirm Rails version is 7.0.2.1, 6.1.4.5, 6.0.4.5, or 5.2.6.1 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual response patterns, unexpected data in responses, thread-related errors
Network Indicators:
- Inconsistent response data between similar requests
SIEM Query:
Search for application errors containing 'ActionDispatch::Executor' or thread state warnings🔗 References
- http://www.openwall.com/lists/oss-security/2022/02/11/5
- https://github.com/rails/rails/commit/f9a2ad03943d5c2ba54e1d45f155442b519c75da
- https://github.com/rails/rails/security/advisories/GHSA-wh98-p28r-vrc9
- https://lists.debian.org/debian-lts-announce/2022/09/msg00002.html
- https://security.netapp.com/advisory/ntap-20240119-0013/
- https://www.debian.org/security/2023/dsa-5372
- http://www.openwall.com/lists/oss-security/2022/02/11/5
- https://github.com/rails/rails/commit/f9a2ad03943d5c2ba54e1d45f155442b519c75da
- https://github.com/rails/rails/security/advisories/GHSA-wh98-p28r-vrc9
- https://lists.debian.org/debian-lts-announce/2022/09/msg00002.html
- https://security.netapp.com/advisory/ntap-20240119-0013/
- https://www.debian.org/security/2023/dsa-5372
