A use after free in the TextBox field Validate action in IReader_ContentProvider can occur for specially crafted PDF files in Foxit Reader SDK (ActiveX) Professional 5.4.0.1031. An attacker can leverage this to gain remote code execution. Relative to CVE-2018-19452, this has a different free location and requires different JavaScript code for exploitation.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Foxit_pdf_sdk_activex | Foxitsoftware | * | 5.5.0 (including) |