Skip to content

Mattermost Uncontrolled Resource Consumption vulnerability

Moderate severity GitHub Reviewed Published Nov 27, 2023 to the GitHub Advisory Database • Updated Nov 28, 2023

Package

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

Affected versions

< 7.8.13

Patched versions

7.8.13
gomod github.com/mattermost/mattermost/server/v8 (Go)
>= 9.1.0, < 9.1.1
>= 9.0.0, < 9.0.2
< 8.1.4
9.1.1
9.0.2
8.1.4

Description

Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string. 

References

Published by the National Vulnerability Database Nov 27, 2023
Published to the GitHub Advisory Database Nov 27, 2023
Reviewed Nov 28, 2023
Last updated Nov 28, 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
Low

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:L

EPSS score

0.055%
(24th percentile)

Weaknesses

CVE ID

CVE-2023-40703

GHSA ID

GHSA-c37r-v8jx-7cv2

Source code

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.