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The XML parsers used in iText versions prior to 5.5.12 and 7.x prior to 7.0.3 do not have external entity processing disabled. This allows attackers to exploit XML External Entity (XXE) vulnerabilities by submitting crafted PDF files containing malicious XML. The vulnerable code path is triggered when iText parses XML content embedded in or referenced by a PDF, allowing the attacker to influence the XML parser's behavior.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository is a proof-of-concept (POC) exploit for CVE-2017-9096, targeting XXE (XML External Entity) vulnerabilities in PDF processing libraries, specifically iText 7.0.2 for Java. The repository contains instructions and code to craft a malicious PDF file with embedded XXE payloads in both the XMP metadata and XFA form sections. The README.md provides detailed steps for modifying a sample PDF to include the XXE payload, referencing an attacker-controlled URL (http://attacker.net). The Java code (Exec.java) loads the crafted PDF and processes its XMP metadata and XFA form, demonstrating how a vulnerable application might trigger the XXE payload. The attack vector is file-based, requiring a victim application to open the malicious PDF. The repository structure includes a Maven build file (pom.xml), the exploit code, and documentation. No weaponized or automated exploitation is present; this is a POC for research and demonstration purposes.
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