CVE-2023-40735
📋 TL;DR
CVE-2023-40735 is an information disclosure vulnerability in the Cavo BUTTERFLY BUTTON architecture that exposes sensitive information to unauthorized actors. This affects the BUTTERFLY BUTTON system as of August 21, 2023, compromising confidentiality and plausible deniability.
💻 Affected Systems
- Cavo BUTTERFLY BUTTON
📦 What is this software?
Butterfly Button by Butterfly Button
⚠️ Risk & Real-World Impact
Worst Case
Complete exposure of sensitive user data, authentication credentials, or private communications leading to identity theft, account compromise, or blackmail.
Likely Case
Unauthorized access to user information, session data, or configuration details that could facilitate further attacks.
If Mitigated
Limited exposure of non-critical information with proper access controls and monitoring in place.
🎯 Exploit Status
Information disclosure vulnerabilities are often easily exploitable once identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.butterfly-button.com/
Restart Required: No
Instructions:
No official patch available. Monitor vendor website for updates and architectural redesign.
🔧 Temporary Workarounds
Network Segmentation
allIsolate BUTTERFLY BUTTON systems from untrusted networks and limit access to authorized users only.
Access Control Enhancement
allImplement strict authentication and authorization controls around BUTTERFLY BUTTON endpoints.
🧯 If You Can't Patch
- Disable or remove BUTTERFLY BUTTON functionality from production systems
- Implement network-level monitoring and alerting for suspicious access patterns
🔍 How to Verify
Check if Vulnerable:
Check if BUTTERFLY BUTTON is installed and active in your environment. Review system architecture for information exposure patterns.Check Version:
Check application configuration or contact vendor for version informationVerify Fix Applied:
Test for information disclosure by attempting to access sensitive endpoints without proper authorization.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to sensitive endpoints
- Unusual data retrieval patterns
- Access from unexpected IP addresses
Network Indicators:
- Unusual data egress from BUTTERFLY BUTTON systems
- Requests to sensitive API endpoints without authentication
SIEM Query:
source="butterfly-button" AND (status=200 OR status=403) AND (uri CONTAINS "/api/" OR uri CONTAINS "/data/")🔗 References
- https://butterfly-button.web.app/
- https://github.com/TheButterflyButton
- https://github.com/TheButterflySDK
- https://github.com/VULSecLabs/Vulnerabilities/blob/main/CVE/CVE-2023-40735.md
- https://www.butterfly-button.com/
- https://www.vulsec.org/advisories
- https://butterfly-button.web.app/
- https://github.com/TheButterflyButton
- https://github.com/TheButterflySDK
- https://github.com/VULSecLabs/Vulnerabilities/blob/main/CVE/CVE-2023-40735.md
- https://www.butterfly-button.com/
- https://www.vulsec.org/advisories
