CVE-2022-24424
📋 TL;DR
CVE-2022-24424 is a path traversal vulnerability in Dell EMC AppSync that allows remote unauthenticated attackers to read arbitrary files on the server filesystem. This affects AppSync versions 3.9 through 4.3, potentially exposing sensitive configuration files, credentials, or other data stored on the server.
💻 Affected Systems
- Dell EMC AppSync
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of sensitive server data including credentials, configuration files, and backup information, potentially leading to lateral movement or data exfiltration.
Likely Case
Unauthorized access to sensitive files containing configuration details, credentials, or application data stored on the server filesystem.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation attempts.
🎯 Exploit Status
The vulnerability requires no authentication and path traversal attacks are generally straightforward to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: AppSync 4.4 and later
Vendor Advisory: https://www.dell.com/support/kbdoc/000197433
Restart Required: Yes
Instructions:
1. Download AppSync version 4.4 or later from Dell support portal. 2. Backup current configuration. 3. Install the update following Dell's upgrade documentation. 4. Restart AppSync services.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to AppSync server to only trusted IP addresses or internal networks
Web Application Firewall
allImplement WAF rules to block path traversal patterns in HTTP requests
🧯 If You Can't Patch
- Isolate AppSync server from internet and restrict access to authorized internal networks only
- Implement strict file system permissions and monitor for unusual file access patterns
🔍 How to Verify
Check if Vulnerable:
Check AppSync version via web interface or installation directory. Versions 3.9-4.3 are vulnerable.Check Version:
Check AppSync web interface or installation properties file for version informationVerify Fix Applied:
Verify AppSync version is 4.4 or later and test path traversal attempts return proper error responses.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../' patterns or attempts to access unusual file paths
- Failed authentication attempts followed by file access patterns
Network Indicators:
- HTTP requests with encoded path traversal sequences (../, ..\, %2e%2e%2f)
- Unusual file download patterns from AppSync server
SIEM Query:
source="appsync" AND (http_uri="*../*" OR http_uri="*..\\*" OR http_uri="*%2e%2e%2f*")