CVE-2022-44729
📋 TL;DR
This CVE describes a Server-Side Request Forgery (SSRF) vulnerability in Apache XML Graphics Batik version 1.16. A malicious SVG file can trigger the loading of external resources by default, potentially causing resource consumption or information disclosure. Users of Apache Batik 1.16 who process untrusted SVG files are affected.
💻 Affected Systems
- Apache XML Graphics Batik
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure through internal network reconnaissance, resource exhaustion leading to denial of service, or potential data exfiltration if internal services are accessible.
Likely Case
Resource consumption attacks causing denial of service, or limited information disclosure from accessible internal services.
If Mitigated
Minimal impact if proper input validation and network segmentation are in place, though resource consumption remains possible.
🎯 Exploit Status
Exploitation requires processing a malicious SVG file, which could be delivered via various vectors including file uploads or web content.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.17 or later
Vendor Advisory: https://lists.apache.org/thread/hco2nw1typoorz33qzs0fcdx0ws6d6j2
Restart Required: Yes
Instructions:
1. Identify all systems using Apache Batik 1.16. 2. Download Apache Batik 1.17 or later from the official Apache repository. 3. Replace the vulnerable version with the patched version. 4. Restart any services or applications using Batik. 5. Test SVG processing functionality.
🔧 Temporary Workarounds
Disable external resource loading
allConfigure Batik to disable loading of external resources when processing SVG files.
Set system property 'org.apache.batik.warn_user_agent_stylesheet' to 'false'
Implement custom URIResolver that blocks external URIs
Input validation and sanitization
allValidate and sanitize SVG files before processing, particularly blocking SVG files with external resource references.
Implement XML parsing with disabled external entity resolution
Use regex patterns to detect and block external URLs in SVG content
🧯 If You Can't Patch
- Implement strict network segmentation to limit Batik's ability to reach internal services
- Deploy web application firewall (WAF) rules to detect and block malicious SVG content patterns
🔍 How to Verify
Check if Vulnerable:
Check the Batik library version in your application dependencies or classpath. If version is exactly 1.16, the system is vulnerable.Check Version:
java -cp "batik-all.jar" org.apache.batik.VersionVerify Fix Applied:
Verify that Batik version is 1.17 or higher and test SVG processing with a controlled external resource request to confirm blocking.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound network connections from Batik processes
- Increased resource consumption during SVG processing
- Failed external resource loading attempts in application logs
Network Indicators:
- Unexpected HTTP/HTTPS requests from Batik hosts to internal or external services
- Patterns of resource loading to unusual domains or IPs
SIEM Query:
source="application_logs" AND ("batik" OR "svg") AND ("external" OR "resource" OR "loading") AND status="error"🔗 References
- http://www.openwall.com/lists/oss-security/2023/08/22/2
- http://www.openwall.com/lists/oss-security/2023/08/22/4
- https://lists.apache.org/thread/hco2nw1typoorz33qzs0fcdx0ws6d6j2
- https://lists.debian.org/debian-lts-announce/2023/10/msg00021.html
- https://security.gentoo.org/glsa/202401-11
- https://xmlgraphics.apache.org/security.html
- http://www.openwall.com/lists/oss-security/2023/08/22/2
- http://www.openwall.com/lists/oss-security/2023/08/22/4
- https://lists.apache.org/thread/hco2nw1typoorz33qzs0fcdx0ws6d6j2
- https://lists.debian.org/debian-lts-announce/2023/10/msg00021.html
- https://security.gentoo.org/glsa/202401-11
- https://xmlgraphics.apache.org/security.html
