MEDIUM6.5

GHSA-m7w4-q5vg-5xfp

Mattermost subject to Denial of Service via upload of special GIF

Quick fix

GHSA-m7w4-q5vg-5xfp — github.com/mattermost/mattermost-server/v6: upgrade to the fixed version with the command below.

go get github.com/mattermost/mattermost-server/v6@v7.2.0

Details

Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.

Are you affected?

Enter the version of the package you're using.

Affected packages

Go/github.com/mattermost/mattermost-server/v6

Introduced in: 7.1.0Fixed in: 7.2.0

Fixgo get github.com/mattermost/mattermost-server/v6@v7.2.0

References

https://nvd.nist.gov/vuln/detail/CVE-2022-3257[ADVISORY]
https://hackerone.com/reports/1620170[WEB]
https://github.com/mattermost/mattermost-server[PACKAGE]
https://mattermost.com/security-updates[WEB]