CVE-2022-47986
📋 TL;DR
CVE-2022-47986 is a critical YAML deserialization vulnerability in IBM Aspera Faspex that allows remote attackers to execute arbitrary code on affected systems. The flaw exists in an obsolete API call that can be exploited without authentication. Organizations running Faspex 4.4.2 Patch Level 1 or earlier are affected.
💻 Affected Systems
- IBM Aspera Faspex
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the Faspex server, enabling data theft, lateral movement, ransomware deployment, or persistent backdoor installation.
Likely Case
Remote code execution leading to data exfiltration, credential harvesting, or deployment of cryptocurrency miners on vulnerable systems.
If Mitigated
If properly patched or workarounds applied, the obsolete API is removed, preventing exploitation entirely.
🎯 Exploit Status
Public exploit code is available on Packet Storm Security and other platforms, making exploitation trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: IBM Aspera Faspex 4.4.2 Patch Level 2
Vendor Advisory: https://www.ibm.com/support/pages/node/6952319
Restart Required: Yes
Instructions:
1. Download IBM Aspera Faspex 4.4.2 PL2 from IBM Fix Central. 2. Backup current configuration and data. 3. Apply the patch following IBM's installation guide. 4. Restart the Faspex service. 5. Verify the obsolete API is no longer accessible.
🔧 Temporary Workarounds
Network Access Control
allRestrict network access to Faspex servers to only trusted IP addresses using firewall rules.
Web Application Firewall
allDeploy a WAF with rules to block requests to the obsolete API endpoint and YAML deserialization patterns.
🧯 If You Can't Patch
- Immediately isolate affected systems from the internet and restrict internal network access
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Faspex version via web interface or configuration files. If version is 4.4.2 PL1 or earlier, the system is vulnerable.Check Version:
Check the Faspex web interface admin panel or examine the application configuration files for version information.Verify Fix Applied:
After patching, verify version shows 4.4.2 PL2 or later. Test that the obsolete API endpoint no longer responds to requests.📡 Detection & Monitoring
Log Indicators:
- Unusual API calls to obsolete endpoints
- YAML deserialization errors
- Suspicious process creation from Faspex service
Network Indicators:
- HTTP requests containing YAML payloads to Faspex API endpoints
- Outbound connections from Faspex server to suspicious IPs
SIEM Query:
source="faspex_logs" AND (uri="*/obsolete_api*" OR message="*YAML*deserialization*")🔗 References
- http://packetstormsecurity.com/files/171772/IBM-Aspera-Faspex-4.4.1-YAML-Deserialization.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/243512
- https://www.ibm.com/support/pages/node/6952319
- http://packetstormsecurity.com/files/171772/IBM-Aspera-Faspex-4.4.1-YAML-Deserialization.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/243512
- https://www.ibm.com/support/pages/node/6952319
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-47986
