CVE-2022-22681
📋 TL;DR
This session fixation vulnerability in Synology Photo Station allows attackers to bypass access controls by manipulating session identifiers. Attackers could gain unauthorized access to photo management functions. All users running vulnerable versions of Synology Photo Station are affected.
💻 Affected Systems
- Synology Photo Station
📦 What is this software?
Photo Station by Synology
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Photo Station, potentially accessing, modifying, or deleting all photos and user data, and using the system as a foothold for further attacks.
Likely Case
Unauthorized access to photo galleries, potential data exposure, and privilege escalation within the Photo Station application.
If Mitigated
Limited impact with proper network segmentation, strong authentication, and monitoring in place.
🎯 Exploit Status
Requires some authentication interaction but specific vectors are unspecified in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.8.16-3506 and later
Vendor Advisory: https://www.synology.com/security/advisory/Synology_SA_21_26
Restart Required: Yes
Instructions:
1. Log into DSM as administrator. 2. Open Package Center. 3. Find Photo Station. 4. Click Update if available. 5. Alternatively, download latest version from Synology website. 6. Install update. 7. Restart Photo Station service.
🔧 Temporary Workarounds
Disable Photo Station
linuxTemporarily disable Photo Station package if not essential
sudo synopkg stop PhotoStation
sudo synopkg uninstall PhotoStation
Network Access Restriction
linuxRestrict access to Photo Station via firewall rules
iptables -A INPUT -p tcp --dport 80,443 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80,443 -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Photo Station from untrusted networks
- Enable detailed logging and monitor for unusual authentication patterns
🔍 How to Verify
Check if Vulnerable:
Check Photo Station version in DSM Package Center or via SSH: synopkg version PhotoStationCheck Version:
synopkg version PhotoStationVerify Fix Applied:
Verify version is 6.8.16-3506 or higher: synopkg version PhotoStation | grep -E '6.8.16-3506|^[7-9]'📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login from same IP
- Session ID reuse from different IP addresses
- Unusual access patterns to admin functions
Network Indicators:
- HTTP requests with manipulated session cookies
- Unusual traffic to Photo Station authentication endpoints
SIEM Query:
source="photo_station.log" (event="login" AND result="success") | stats count by src_ip, user | where count > threshold