CVE-2023-2793: Stack exhaustion in PreparePostForClientWithEmbedsAndImages
First published: Fri Jun 16 2023(Updated: )
Mattermost fails to validate links on external websites when constructing a preview for a linked website, allowing an attacker to cause a denial-of-service by a linking to a specially crafted webpage in a message.
Credit: responsibledisclosure@mattermost.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mattermost Mattermost | >=7.8.0<=7.8.3 | |
| Mattermost Mattermost | >=7.9.0<=7.9.2 | |
| Mattermost Mattermost | =7.10.0 |
Remedy
Update Mattermost to version v7.8.3, v7.9.2, 7.10.1 or higher.
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID for this issue is CVE-2023-2793.
What is the severity of CVE-2023-2793?
The severity of CVE-2023-2793 is medium.
How does Mattermost fail to validate links on external websites?
Mattermost fails to validate links on external websites when constructing a preview for a linked website.
What is the impact of CVE-2023-2793?
The vulnerability allows an attacker to cause a denial-of-service by linking to a specially crafted webpage in a message.
How can I fix CVE-2023-2793?
To fix CVE-2023-2793, update your Mattermost installation to a version that includes the security updates provided by the vendor.
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- version/mattermost mattermost/7.10.0