Foxit Pdf Reader

The application opened a PDF file containing an abnormal Unity 3D object. During parsing, the application incorrectly resolved a portion of the abnormal object as a pointer and used it as a valid address, ultimately causing the application to crash.

Published: 2026-07-08T07:35:55.012Z
Updated: 2026-07-08T12:47:34.866Z

The input file does not need to be strictly in a structurally valid PDF format. Instead, after reviewing the content, the original document disguised as a PDF will be sent to the parser. Malicious documents will construct malicious external entities that, through the protocol, point to local paths, thereby allowing access to any local files within the user's permission range.

Published: 2026-07-08T07:36:07.818Z
Updated: 2026-07-08T13:15:43.861Z

The PRC file header parsing logic trusts the constructed file structure description information, assumes that the underlying array contains elements and reads them, leading to out-of-bounds reads and application crashes.

Published: 2026-07-08T07:35:56.660Z
Updated: 2026-07-08T12:40:12.497Z

During the PRC parsing stage, there is a lack of boundary verification for the PRC entity index, which leads to an out-of-bounds read of the entity array. As a result, the application crashes.

Published: 2026-07-08T07:35:58.222Z
Updated: 2026-07-08T12:39:33.187Z

When the application opens a PDF and executes JavaScript, it performs abnormal operations on the list box field, and this operation is repeated after the form is reset. During this process, the application failed to adequately verify the validity of the form objects and their internal dictionary pointers, resulting in accessing internal members of invalid or improperly initialized fields. This led to an illegal pointer read, ultimately causing the application to crash.

Published: 2026-07-08T07:35:59.810Z
Updated: 2026-07-09T17:37:54.106Z