Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. Starting in version 0.0.1 and prior to 1.15.12, API_SET_SECURE_PARAM may have an arithmetic overflow deep in the memory allocation subsystem that would lead to a smaller allocation than requested, and a buffer overflow. Version 1.15.12 fixes the issue.
The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.