What is CVE-2023-40187?

CVE-2023-40187 is a Use-After-Free vulnerability in FreeRDP, specifically in the avc420_ensure_buffer and avc444_ensure_buffer functions.

How severe is CVE-2023-40187?

CVE-2023-40187 has a severity rating of 9.8 (Critical).

Which versions of FreeRDP are affected by CVE-2023-40187?

Versions 3.0.0-beta1 and 3.0.0-beta2 of FreeRDP are affected by CVE-2023-40187.

What is the CWE-ID associated with CVE-2023-40187?

The Common Weakness Enumeration (CWE) ID associated with CVE-2023-40187 is CWE-416.

How can the Use-After-Free vulnerability CVE-2023-40187 be fixed?

To fix the Use-After-Free vulnerability CVE-2023-40187, it is recommended to update to a patched version of FreeRDP.

Vulnerability/
CVE-2023-40187

critical

9.8

CWE

416

31/8/2023

2/8/2024

CVE-2023-40187: Use-After-Free in FreeRDP

First published: Thu Aug 31 2023(Updated: )

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. Affected versions of the 3.x beta branch are subject to a Use-After-Free issue in the `avc420_ensure_buffer` and `avc444_ensure_buffer` functions. If the value of `piDstSize[x]` is 0, `ppYUVDstData[x]` will be freed. However, in this case `ppYUVDstData[x]` will not have been updated which leads to a Use-After-Free vulnerability. This issue has been addressed in version 3.0.0-beta3. Users of the 3.x beta releases are advised to upgrade. There are no known workarounds for this vulnerability.

Credit: security-advisories@github.com security-advisories@github.com

Affected Software	Affected Version	How to fix
	=3.0.0-beta1
	=3.0.0-beta2
FreeRDP FreeRDP	=3.0.0-beta1
FreeRDP FreeRDP	=3.0.0-beta2

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Frequently Asked Questions

What is CVE-2023-40187?
CVE-2023-40187 is a Use-After-Free vulnerability in FreeRDP, specifically in the avc420_ensure_buffer and avc444_ensure_buffer functions.
How severe is CVE-2023-40187?
CVE-2023-40187 has a severity rating of 9.8 (Critical).
Which versions of FreeRDP are affected by CVE-2023-40187?
Versions 3.0.0-beta1 and 3.0.0-beta2 of FreeRDP are affected by CVE-2023-40187.
What is the CWE-ID associated with CVE-2023-40187?
The Common Weakness Enumeration (CWE) ID associated with CVE-2023-40187 is CWE-416.
How can the Use-After-Free vulnerability CVE-2023-40187 be fixed?
To fix the Use-After-Free vulnerability CVE-2023-40187, it is recommended to update to a patched version of FreeRDP.

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