CVE-2024-34462
📋 TL;DR
This vulnerability in Alinto SOGo allows cross-site scripting (XSS) attacks during attachment preview functionality. Attackers can inject malicious scripts that execute in users' browsers when they preview attachments. All SOGo users through version 5.10.0 are affected.
💻 Affected Systems
- Alinto SOGo
📦 What is this software?
Sogo by Alinto
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, or redirect users to malicious sites, potentially leading to account compromise and data theft.
Likely Case
Attackers could steal session tokens or credentials from authenticated users, leading to unauthorized access to email and calendar data.
If Mitigated
With proper input validation and output encoding, the risk is reduced to minimal, though the vulnerability still exists in unpatched systems.
🎯 Exploit Status
Exploitation requires user interaction (previewing a malicious attachment) but the XSS payload execution is straightforward once delivered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.10.1 and later
Vendor Advisory: https://github.com/Alinto/sogo/commit/2e37e59ed140d4aee0ff2fba579ca5f83f2c5920
Restart Required: Yes
Instructions:
1. Backup your SOGo configuration and data. 2. Update SOGo to version 5.10.1 or later using your package manager. 3. Restart the SOGo service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Disable attachment preview
linuxTemporarily disable the attachment preview functionality in SOGo configuration to prevent exploitation.
Edit SOGo configuration file and set appropriate flags to disable preview features
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in attachment preview requests.
- Educate users to avoid previewing attachments from untrusted sources and implement strict content security policies.
🔍 How to Verify
Check if Vulnerable:
Check SOGo version: if version is 5.10.0 or earlier, the system is vulnerable.Check Version:
sogo-tool version | grep VersionVerify Fix Applied:
Verify SOGo version is 5.10.1 or later and test attachment preview functionality with safe test payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual attachment preview requests with script tags or JavaScript code in parameters
- Multiple failed preview attempts from single IP
Network Indicators:
- HTTP requests to attachment preview endpoints containing script tags or encoded JavaScript
SIEM Query:
source="sogo.log" AND ("preview" OR "attachment") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")