What is the severity of CVE-2024-36257?

CVE-2024-36257 has been assigned a medium severity rating due to potential unauthorized profile picture updates across remote servers.

How do I fix CVE-2024-36257?

To mitigate CVE-2024-36257, upgrade Mattermost to versions beyond 9.5.5 or 9.8.0 as soon as possible.

What versions are affected by CVE-2024-36257?

CVE-2024-36257 affects Mattermost versions 9.5.0 through 9.5.5 and version 9.8.0.

What is the impact of CVE-2024-36257 on Mattermost?

The impact of CVE-2024-36257 includes the risk of unauthorized updates to user profile pictures from connected remote servers.

Is there a workaround for CVE-2024-36257?

Currently, the best action against CVE-2024-36257 is to update to a secure version of Mattermost, as no official workaround is provided.

Vulnerability/
CVE-2024-36257

medium

5.3

CWE

284

3/7/2024

2/8/2024

CVE-2024-36257: Lack of permission check when updating the profile picture of a remote user (shared channels enabled)

First published: Wed Jul 03 2024(Updated: )

Mattermost versions 9.5.x <= 9.5.5 and 9.8.0, when using shared channels with multiple remote servers connected, fail to check that the remote server A requesting the server B to update the profile picture of a user is the remote that actually has the user as a local one . This allows a malicious remote A to change the profile images of users that belong to another remote server C that is connected to the server A.

Credit: responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost	>=9.5.0<9.5.6
Mattermost	=9.8.0

Remedy

Update Mattermost to versions 9.9.0, 9.8.1, 9.5.6 or higher.

Never miss a vulnerability like this again

Reference Links

https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2024-36257?
CVE-2024-36257 has been assigned a medium severity rating due to potential unauthorized profile picture updates across remote servers.
How do I fix CVE-2024-36257?
To mitigate CVE-2024-36257, upgrade Mattermost to versions beyond 9.5.5 or 9.8.0 as soon as possible.
What versions are affected by CVE-2024-36257?
CVE-2024-36257 affects Mattermost versions 9.5.0 through 9.5.5 and version 9.8.0.
What is the impact of CVE-2024-36257 on Mattermost?
The impact of CVE-2024-36257 includes the risk of unauthorized updates to user profile pictures from connected remote servers.
Is there a workaround for CVE-2024-36257?
Currently, the best action against CVE-2024-36257 is to update to a secure version of Mattermost, as no official workaround is provided.

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