Mattermost up to 9.5.6/9.7.5/9.8.1/9.9.0 Shared Channel access control

Summaryinfo

A vulnerability categorized as critical has been discovered in Mattermost up to 9.5.6/9.7.5/9.8.1/9.9.0. This vulnerability affects unknown code of the component Shared Channel Handler. Such manipulation leads to access control. This vulnerability is documented as CVE-2024-39777. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mattermost up to 9.5.6/9.7.5/9.8.1/9.9.0. Affected by this issue is an unknown functionality of the component Shared Channel Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.

The weakness was released by Juho Forsén. The advisory is available at mattermost.com. This vulnerability is handled as CVE-2024-39777 since 07/23/2024. The exploitation is known to be easy. The attack may be launched remotely. The exploitation needs additional levels of successful authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 9.5.7, 9.7.6, 9.8.2, 9.9.1 or 9.10.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Groupware Software

Name

• Mattermost

Version

• 9.0
• 9.1
• 9.2
• 9.3
• 9.4
• 9.5
• 9.5.0
• 9.5.1
• 9.5.2
• 9.5.3
• 9.5.4
• 9.5.5
• 9.5.6
• 9.6
• 9.7
• 9.7.0
• 9.7.1
• 9.7.2
• 9.7.3
• 9.7.4
• 9.7.5
• 9.8
• 9.8.0
• 9.8.1
• 9.9.0

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion