CVE-2023-5196: DoS via Channel Notification Properties
First published: Fri Sep 29 2023(Updated: )
Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.
Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mattermost Mattermost | >=7.0.0<7.8.10 | |
| Mattermost Mattermost | >=8.0.0<8.0.2 | |
| Mattermost Mattermost | >=8.1.0<8.1.1 | |
| go/github.com/mattermost/mattermost-server/v6 | <7.8.10 | 7.8.10 |
| go/github.com/mattermost/mattermost/server/v8 | >=8.0.0<8.0.2 | 8.0.2 |
| go/github.com/mattermost/mattermost/server/v8 | =8.1.0 | 8.1.1 |
Remedy
Update Mattermost Server to versions 7.8.10, 8.0.2, 8.1.1 or higher.
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Reference Links
Frequently Asked Questions
What is CVE-2023-5196?
CVE-2023-5196 is a vulnerability in Mattermost that allows an attacker to send a really long value for a notification_prop, causing the server to consume an abnormal quantity of computing resources and possibly become temporarily unavailable.
How does CVE-2023-5196 impact Mattermost users?
CVE-2023-5196 can lead to server overload and unavailability, affecting the normal usage of Mattermost by its users.
What is the severity of CVE-2023-5196?
CVE-2023-5196 has a severity rating of medium with a CVSS score of 6.5.
Which versions of Mattermost are affected by CVE-2023-5196?
Mattermost versions up to and including 8.0.2 are affected by CVE-2023-5196.
How can I fix CVE-2023-5196?
To fix CVE-2023-5196, upgrade Mattermost to version 8.1.1 or later.
- collector/nvd-api
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- collector/github-advisory-latest
- alias/GHSA-33r7-wjfc-7w98
- alias/CVE-2023-5196
- collector/github-advisory
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- agent/softwarecombine
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- source/MITRE
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- vendor/mattermost
- canonical/mattermost mattermost
- version/mattermost mattermost/7.0.0
- version/mattermost mattermost/8.0.0
- version/mattermost mattermost/8.1.0
- package-manager/go