CVE-2024-23186
📋 TL;DR
This vulnerability allows attackers to execute client-side scripts via malicious email display names on specific mobile devices. It affects users of Open-Xchange AppSuite email clients on vulnerable versions, potentially leading to unauthorized API requests or data extraction from user accounts.
💻 Affected Systems
- Open-Xchange AppSuite
📦 What is this software?
Ox App Suite by Open Xchange
⚠️ Risk & Real-World Impact
Worst Case
Attackers could perform malicious API requests with user privileges, extract sensitive account information, or perform actions on behalf of the user.
Likely Case
Targeted phishing campaigns leading to account compromise or data exfiltration from individual users.
If Mitigated
Limited impact with proper email filtering and client-side script execution controls.
🎯 Exploit Status
Requires user interaction (opening/viewing malicious email) and specific mobile device configurations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.22 or later
Vendor Advisory: https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2024/oxas-adv-2024-0002.json
Restart Required: Yes
Instructions:
1. Download Open-Xchange AppSuite version 8.22 or later from official sources. 2. Backup current configuration and data. 3. Apply the update following vendor documentation. 4. Restart all AppSuite services. 5. Verify functionality.
🔧 Temporary Workarounds
Email Filtering
allImplement email filtering to block or sanitize emails with suspicious display names containing script tags or special characters.
Mobile Client Restrictions
allTemporarily restrict or monitor mobile device access to email services until patching is complete.
🧯 If You Can't Patch
- Implement strict email content filtering to sanitize display names
- Disable or restrict mobile device access to email web interface
🔍 How to Verify
Check if Vulnerable:
Check AppSuite version against vulnerable versions (pre-8.22) and review mobile client configurations.Check Version:
Check AppSuite administration interface or configuration files for version information.Verify Fix Applied:
Verify AppSuite version is 8.22 or later and test email display name handling on mobile devices.📡 Detection & Monitoring
Log Indicators:
- Unusual API requests from user accounts
- Email processing errors related to display names
- Mobile client access patterns
Network Indicators:
- Suspicious email traffic with encoded display names
- Unexpected API calls from authenticated sessions
SIEM Query:
Search for emails with display names containing script tags or special characters, combined with mobile user agent strings.🔗 References
- http://seclists.org/fulldisclosure/2024/May/3
- https://documentation.open-xchange.com/appsuite/releases/8.22/
- https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2024/oxas-adv-2024-0002.json
- http://seclists.org/fulldisclosure/2024/May/3
- https://documentation.open-xchange.com/appsuite/releases/8.22/
- https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2024/oxas-adv-2024-0002.json
