A remote code execution vulnerability exists in Microsoft COM for Windows when it fails to properly handle serialized objects, aka Microsoft COM for Windows Remote Code Execution Vulnerability. This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Windows_10 | Microsoft | - (including) | - (including) |
| Windows_10 | Microsoft | 1607 (including) | 1607 (including) |
| Windows_10 | Microsoft | 1703 (including) | 1703 (including) |
| Windows_10 | Microsoft | 1709 (including) | 1709 (including) |
| Windows_10 | Microsoft | 1803 (including) | 1803 (including) |
| Windows_7 | Microsoft | –sp1 (including) | –sp1 (including) |
| Windows_8.1 | Microsoft | - (including) | - (including) |
| Windows_rt_8.1 | Microsoft | - (including) | - (including) |
| Windows_server_2008 | Microsoft | –sp2 (including) | –sp2 (including) |
| Windows_server_2008 | Microsoft | r2-sp1 (including) | r2-sp1 (including) |
| Windows_server_2012 | Microsoft | - (including) | - (including) |
| Windows_server_2012 | Microsoft | r2 (including) | r2 (including) |
| Windows_server_2016 | Microsoft | - (including) | - (including) |
| Windows_server_2016 | Microsoft | 1709 (including) | 1709 (including) |
| Windows_server_2016 | Microsoft | 1803 (including) | 1803 (including) |
It is often convenient to serialize objects for communication or to save them for later use. However, deserialized data or code can often be modified without using the provided accessor functions if it does not use cryptography to protect itself. Furthermore, any cryptography would still be client-side security – which is a dangerous security assumption. Data that is untrusted can not be trusted to be well-formed. When developers place no restrictions on “gadget chains,” or series of instances and method invocations that can self-execute during the deserialization process (i.e., before the object is returned to the caller), it is sometimes possible for attackers to leverage them to perform unauthorized actions, like generating a shell.