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Mattermost subject to Denial of Service via upload of special GIF

Moderate severity GitHub Reviewed Published Sep 25, 2022 to the GitHub Advisory Database • Updated Mar 27, 2023

Package

gomod github.com/mattermost/mattermost-server/v6 (Go)

Affected versions

>= 7.1.0, < 7.2.0

Patched versions

7.2.0

Description

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.

References

Published by the National Vulnerability Database Sep 23, 2022
Published to the GitHub Advisory Database Sep 25, 2022
Reviewed Sep 28, 2022
Last updated Mar 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.079%
(36th percentile)

Weaknesses

CVE ID

CVE-2022-3257

GHSA ID

GHSA-m7w4-q5vg-5xfp

Source code

Credits

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