SAP Hybris Deserialization RCE
Description
The virtualjdbc extension in SAP Hybris Commerce Cloud contains an insecure deserialization vulnerability that allows untrusted data to be deserialized without proper validation. When an application deserializes untrusted data, attackers can manipulate serialized objects to instantiate arbitrary classes and execute malicious code. This vulnerability exists because the application accepts and processes specially-crafted serialized Java objects from untrusted sources without implementing secure deserialization controls.
Remediation
Apply security patches immediately by upgrading SAP Hybris Commerce Cloud to the latest patched version that addresses CVE-2019-0344. Consult SAP Security Notes and your SAP support channel for the specific patch level required for your version.
If immediate patching is not possible, implement the following temporary mitigations:
1. Disable the virtualjdbc extension if it is not required for business operations
2. Restrict network access to the vulnerable endpoints using firewall rules or web application firewall (WAF) policies to allow only trusted IP addresses
3. Implement input validation to reject suspicious serialized data patterns
4. Monitor for exploitation attempts by reviewing logs for unusual deserialization activity or unexpected DNS queries to external domains
After patching, verify the fix by conducting vulnerability scanning and penetration testing to confirm the deserialization vulnerability has been remediated.