Stirling-PDF from 2.13.2 through 3.2.0 contains an incomplete denylist in DatabaseService.validateSqlContent() that allows administrators to bypass H2 import restrictions using CREATE OR REPLACE ALIAS. Authenticated administrators can upload a crafted SQL backup to the import-database endpoint, where RUNSCRIPT defines H2 Java function aliases and restores Java-method execution.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://abraxaslabs.tech/research/stirling-h2-import-leftover
disclosure@vulncheck.com
https://abraxaslabs.tech/research/stirling-pdf-3.2.0-leftovers
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https://github.com/Stirling-Tools/Stirling-PDF/blob/v3.2.0/app/proprietary/src/…
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https://github.com/abraxas/stirling-h2-import-leftover
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https://www.vulncheck.com/advisories/stirling-pdf-2.13.2-through-3.2.0-h2-sql-d…
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