CVE-2024-39837: Malicious remote can create arbitrary channels
First published: Thu Aug 01 2024(Updated: )
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly restrict channel creation which allows a malicious remote to create arbitrary channels, when shared channels were enabled.
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-2024-39837?
CVE-2024-39837 is considered a critical vulnerability as it allows unauthorized channel creation by malicious users.
How do I fix CVE-2024-39837?
To fix CVE-2024-39837, upgrade Mattermost to version 9.9.1 or 9.5.7 or later.
What versions are affected by CVE-2024-39837?
CVE-2024-39837 affects Mattermost versions 9.9.0 and 9.5.0 to 9.5.6.
What is the impact of CVE-2024-39837?
The impact of CVE-2024-39837 is that it allows a malicious remote attacker to create arbitrary channels when shared channels are enabled.
Is there a workaround for CVE-2024-39837 before upgrading?
There is no officially recommended workaround for CVE-2024-39837, so upgrading is the best option.
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