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Palo Alto Networks Unit 42 has reported ongoing exploitation attempts targeting CVE-2024-27564, an SSRF (Server-Side Request Forgery) vulnerability affecting ChatGPT servers. Attackers are probing for `/etc/passwd` access and using Out-of-Band Application Security Testing (OAST) domains. Notably, the Education (16.6%) and Manufacturing (8%) sectors have seen increased attacks since February 2025.
Source: Read the full report here
You Should Know: Detecting & Mitigating SSRF Attacks
1. Identifying SSRF Vulnerabilities
SSRF allows attackers to manipulate server-side requests to internal systems. Check for:
– Requests with internal IPs (127.0.0.1, 192.168.x.x, 10.x.x.x).
– Unusual outbound connections from servers.
Linux Command to Monitor Suspicious Requests:
sudo tcpdump -i eth0 'dst net 192.168.0.0/16 or dst net 10.0.0.0/8' -w ssrf_probes.pcap
2. Blocking Malicious Payloads
Use ModSecurity rules to block SSRF attempts:
SecRule REQUEST_URI "@contains /etc/passwd" "id:1001,deny,status:403,msg:'SSRF Attempt'"
3. Restricting Outbound Connections
Configure firewalls to limit outbound traffic:
iptables rule to block external SSRF probes iptables -A OUTPUT -p tcp --dport 80 -d 169.254.169.254 -j DROP Block AWS metadata endpoint
4. Log Analysis for SSRF Patterns
Check logs for OAST domains (Burp Collaborator, Interactsh):
grep -E "interact.sh|burpcollaborator.net" /var/log/nginx/access.log
5. Patching Vulnerable Systems
Ensure ChatGPT-related services are updated. Check for vulnerable `pictureproxy.php` implementations.
What Undercode Say
SSRF remains a critical attack vector, especially in AI-driven platforms like ChatGPT. Defensive measures include:
– Network Segmentation: Isolate internal services.
– Input Validation: Reject malicious URLs in API requests.
– Logging & Monitoring: Detect unusual internal requests.
Additional Commands for Security Teams:
Check active connections (Linux)
netstat -tuln | grep -E '127.0.0.1|192.168'
Windows: Detect rogue HTTP requests
Get-NetTCPConnection | Where-Object { $_.RemoteAddress -like '10.' }
Expected Output:
<h2 style="color:yellow;">Active Internet connections (only servers)</h2> <h2 style="color:yellow;">tcp6 0 0 ::1:8080 ::: LISTEN</h2>
Stay vigilant against SSRF by enforcing strict egress controls and monitoring internal request patterns.
Expected Output:
A detailed analysis of SSRF exploitation trends with actionable mitigation steps.
References:
Reported By: Unit42 Cve202427564 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
