CVE-2024-57004
📋 TL;DR
This Cross-Site Scripting (XSS) vulnerability in Roundcube Webmail allows authenticated users to upload malicious files as email attachments. When recipients view these emails in their SENT folder, the XSS payload executes, potentially stealing session cookies or performing unauthorized actions. Only Roundcube Webmail 1.6.9 installations with authenticated user access are affected.
💻 Affected Systems
- Roundcube Webmail
📦 What is this software?
Webmail by Roundcube
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal admin session cookies, take over accounts, access sensitive emails, and pivot to internal systems.
Likely Case
Authenticated attackers steal other users' session cookies to impersonate them and access their email accounts.
If Mitigated
With proper input validation and output encoding, the XSS payload would be neutralized before execution.
🎯 Exploit Status
Exploitation requires authenticated user credentials; proof-of-concept available on GitHub.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.10 or later
Vendor Advisory: https://github.com/roundcube/roundcubemail/releases/tag/1.6.9
Restart Required: No
Instructions:
1. Backup your Roundcube installation and database. 2. Download the latest version from roundcube.net. 3. Replace the existing files with the new version. 4. Run any database update scripts if required.
🔧 Temporary Workarounds
Disable file uploads
allTemporarily disable attachment uploads in Roundcube configuration
Edit config.inc.php and set: $config['enable_attachments'] = false;
Implement WAF rules
linuxAdd web application firewall rules to block malicious file uploads
Add ModSecurity rule: SecRule FILES_TMPNAMES "@rx malicious_pattern" "deny,status:403"
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to mitigate XSS impact
- Enable file type validation and restrict uploads to specific safe extensions
🔍 How to Verify
Check if Vulnerable:
Check if Roundcube version is 1.6.9 using the version check commandCheck Version:
grep -r 'Version' /path/to/roundcube/program/include/iniset.php | grep -o '[0-9]\+\.[0-9]\+\.[0-9]\+'Verify Fix Applied:
Verify installation is version 1.6.10 or later and test file upload functionality📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads with suspicious extensions
- Multiple failed login attempts followed by successful uploads
Network Indicators:
- HTTP POST requests with malicious script content in file uploads
SIEM Query:
source="roundcube.log" ("attachment" AND "upload") AND ("script" OR "javascript" OR "onload=")