CVE-2023-31848
📋 TL;DR
CVE-2023-31848 is a Server-Side Request Forgery (SSRF) vulnerability in davinci 0.3.0-rc that allows attackers to make unauthorized requests from the server to internal or external systems. This affects organizations running vulnerable versions of davinci, potentially exposing internal networks and services to attackers.
💻 Affected Systems
- davinci
📦 What is this software?
Davinci by Davinci Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data, pivot to other systems, or perform attacks against internal infrastructure using the server as a proxy.
Likely Case
Information disclosure from internal services, scanning of internal networks, or limited data exfiltration from accessible internal endpoints.
If Mitigated
Limited impact if network segmentation restricts server outbound connections and internal services require authentication.
🎯 Exploit Status
SSRF vulnerabilities are commonly exploited and public GitHub issues demonstrate the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 0.3.0-rc
Vendor Advisory: https://github.com/edp963/davinci/issues/2326
Restart Required: Yes
Instructions:
1. Upgrade davinci to a version newer than 0.3.0-rc. 2. Restart the davinci service. 3. Verify the fix by testing SSRF vectors.
🔧 Temporary Workarounds
Network egress filtering
allRestrict outbound network connections from davinci servers to only necessary destinations
Input validation
allImplement URL validation and whitelisting for all user-supplied URL parameters
🧯 If You Can't Patch
- Implement strict network segmentation to isolate davinci servers from sensitive internal systems
- Deploy a web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Check davinci version. If running 0.3.0-rc, test SSRF by attempting to make requests to internal services via davinci's vulnerable endpoints.Check Version:
Check davinci configuration files or application metadata for version informationVerify Fix Applied:
After upgrade, test SSRF vectors that previously worked. Attempt to access internal services (like 127.0.0.1, 169.254.169.254) through davinci endpoints.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound requests from davinci server
- Requests to internal IP addresses or metadata services
- Multiple failed connection attempts to unusual destinations
Network Indicators:
- davinci server making unexpected outbound connections
- Traffic to internal-only services from davinci server
- Requests to cloud metadata endpoints (169.254.169.254)
SIEM Query:
source="davinci" AND (dest_ip=127.0.0.1 OR dest_ip=169.254.169.254 OR dest_ip IN [internal_ranges])