In FreeRDP less than or equal to 2.0.0, an Integer Overflow to Buffer Overflow exists. When using /video redirection, a manipulated server can instruct the client to allocate a buffer with a smaller size than requested due to an integer overflow in size calculation. With later messages, the server can manipulate the client to write data out of bound to the previously allocated buffer. This has been patched in 2.1.0.
The product performs a calculation to determine how much memory to allocate, but an integer overflow can occur that causes less memory to be allocated than expected, leading to a buffer overflow.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freerdp | Freerdp | * | 2.1.0 (excluding) |
| Red Hat Enterprise Linux 7 | RedHat | freerdp-0:2.1.1-2.el7 | * |
| Red Hat Enterprise Linux 8 | RedHat | freerdp-2:2.1.1-1.el8 | * |
| Red Hat Enterprise Linux 8 | RedHat | vinagre-0:3.22.0-23.el8 | * |
| Freerdp | Ubuntu | trusty | * |
| Freerdp2 | Ubuntu | bionic | * |
| Freerdp2 | Ubuntu | eoan | * |
| Freerdp2 | Ubuntu | focal | * |
| Freerdp2 | Ubuntu | trusty | * |
| Freerdp2 | Ubuntu | upstream | * |