PT-2024-28671 · Mattermost · Mattermost

Juho Forsén · Published 2024-08-01 · Updated 2024-08-30 · CVE-2024-39777

Positive Technologies (AI Summary)

CVSS v3.1

9.6

Critical

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Name of the Vulnerable Software and Affected Versions Mattermost versions 9.9.x through 9.9.0 Mattermost versions 9.5.x through 9.5.6 Mattermost versions 9.7.x through 9.7.5 Mattermost versions 9.8.x through 9.8.1

Description The issue allows malicious remote users to send unsolicited invites, exposing access to local channels when shared channels are enabled. This can lead to a local channel becoming shared without the consent of the local admin, by sending an invite with the ID of an existing local channel.

Recommendations For Mattermost versions 9.9.x through 9.9.0, update to a version that includes the fix for this issue. For Mattermost versions 9.5.x through 9.5.6, update to a version that includes the fix for this issue. For Mattermost versions 9.7.x through 9.7.5, update to a version that includes the fix for this issue. For Mattermost versions 9.8.x through 9.8.1, update to a version that includes the fix for this issue. As a temporary workaround, consider disabling shared channels until a patch is available.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2024-39777

GHSA-Q22Q-2RRF-M27P

GO-2024-3092

Affected Products

Mattermost

References · 9

• https://mattermost.com/security-updates · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-39777 · Security Note
• https://osv.dev/vulnerability/CVE-2024-39777 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-q22q-2rrf-m27p · Vendor Advisory
• https://osv.dev/vulnerability/GO-2024-3092 · Vendor Advisory
• https://github.com/mattermost/mattermost · Note
• https://github.com/advisories/GHSA-q22q-2rrf-m27p · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-39777 · Note
• https://t.me/cvedetector/2243 · Telegram Post