CVE-2024-41926: Malicious remote can claim that a user was synced from another remote
First published: Thu Aug 01 2024(Updated: )
Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.
Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/github.com/mattermost/mattermost/server/v8 | =9.9.0 | 9.9.1 |
| go/github.com/mattermost/mattermost/server/v8 | >=9.5.0<9.5.7 | 9.5.7 |
| Mattermost | >=9.5.0<9.5.7 | |
| Mattermost | =9.9.0 |
Remedy
Update Mattermost to versions 9.10.0, 9.9.1, 9.5.7 or higher.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-41926?
CVE-2024-41926 is a medium severity vulnerability that allows arbitrary RemoteId values to be set for synced users.
How do I fix CVE-2024-41926?
To fix CVE-2024-41926, upgrade Mattermost to version 9.9.1 or 9.5.7.
Which versions of Mattermost are affected by CVE-2024-41926?
Mattermost versions 9.9.x up to 9.9.0 and 9.5.x up to 9.5.6 are affected by CVE-2024-41926.
What type of vulnerability is CVE-2024-41926?
CVE-2024-41926 is a validation error vulnerability that allows manipulation of user sync messages.
Can CVE-2024-41926 be exploited remotely?
Yes, CVE-2024-41926 can be exploited remotely by a malicious actor to claim unauthorized user synchronization.
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