Mattermost Server up to 9.6.0 Add Member /api/v4/users/me/teams access control

Summaryinfo

A vulnerability was found in Mattermost Server up to 8.1.10/9.3.2/9.4.3/9.5.1/9.6.0. It has been rated as critical. This issue affects some unknown processing of the file /api/v4/users/me/teams of the component Add Member Handler. This manipulation causes access control. This vulnerability appears as CVE-2024-29221. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Mattermost Server up to 8.1.10/9.3.2/9.4.3/9.5.1/9.6.0 and classified as critical. Affected by this vulnerability is an unknown function of the file /api/v4/users/me/teams of the component Add Member Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Improper Access Control in Mattermost Server versions 9.5.x before 9.5.2, 9.4.x before 9.4.4, 9.3.x before 9.3.3, 8.1.x before 8.1.11 lacked proper access control in the `/api/v4/users/me/teams` endpoint allowing a team admin to get the invite ID of their team, thus allowing them to invite users, even if the "Add Members" permission was explicitly removed from team admins.

The weakness was presented by Omar Ahmed. It is possible to read the advisory at mattermost.com. This vulnerability is known as CVE-2024-29221 since 04/03/2024. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 8.1.11, 9.3.3, 9.4.4, 9.5.2 or 9.6.0 eliminates this vulnerability.

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Productinfo

Type

• Groupware Software

Vendor

• Mattermost

Name

• Server

Version

• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.1.4
• 8.1.5
• 8.1.6
• 8.1.7
• 8.1.8
• 8.1.9
• 8.1.10
• 9.0
• 9.1
• 9.2
• 9.3
• 9.3.0
• 9.3.1
• 9.3.2
• 9.4
• 9.4.0
• 9.4.1
• 9.4.2
• 9.4.3
• 9.5
• 9.5.0
• 9.5.1
• 9.6.0

License

• open-source

CPE 2.3info

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CPE 2.2info

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