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.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h25x-cqr6-fp6g | third party advisory |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html | vendor advisory mailing list third party advisory |
| https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html | third party advisory mailing list |