Summary
Ein Angreifer kann mehrere Schwachstellen in Mattermost ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
Product
Mattermost ist ein webbasierter Instant-Messaging-Dienst.
Vulnerabilities 9
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Medium 4.3
Denial of Service via specially crafted block fields in Mattermost Boards
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…
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Medium 4.3
Permalink previews displayed for posts in archived channels even if users are disallowed to view archived channels
Mattermost fails to check whether the “Allow users to view archived channels” setting is enabled during permalink previews display, allowing members to view permalink previews of archived channels even if the “Allow users to view archived channels” setting …
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Medium 4.3
Users full name disclosure through Mattermost Boards with Show Full Name Option disabled
Mattermost fails to properly validate the "Show Full Name" option in a few endpoints in Mattermost Boards, allowing a member to get the full name of another user even if the Show Full Name option was disabled.
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Medium 4.3
Open redirect in /oauth/<service>/mobile_login?redirect_to=
Mattermost fails to properly check a redirect URL parameter allowing for an open redirect was possible when the user clicked "Back to Mattermost" after providing a invalid custom url scheme in /oauth/{service}/mobile_login?redirect_to=
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Medium 4.3
Username and Icon override can be used by members when Hardened Mode is enabled
Mattermost fails to check if hardened mode is enabled when overriding the username and/or the icon when posting a post. If settings allowed integrations to override the username and profile picture when posting, a member could also override the username and i…
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Medium 4.3
Denial of Service via Board Import Zip Bomb
Mattermost fails to limit the amount of data extracted from compressed archives during board import in Mattermost Boards allowing an attacker to consume excessive resources, possibly leading to Denial of Service, by importing a board using a specially crafted…
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Medium 4.3
Log Flooding due to specially crafted requests in different endpoints
Mattermost fails to limit the log size of server logs allowing an attacker sending specially crafted requests to different endpoints to potentially overflow the log.
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Medium 4.3
Insecure Direct Object Reference in /plugins/focalboard/ api/v2/users of Mattermost Boards
Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another user to get their information (e.g. name, surname, nickname) via Mattermost Boards.
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Low 3.1
HTML injection via channel autocomplete
Mattermost fails to use innerText / textContent when setting the channel name in the webapp during autocomplete, allowing an attacker to inject HTML to a victim's page by create a channel name that is valid HTML. No XSS is possible though.
Revision history
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#2
CVE's ergänzt
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#1
Initiale Fassung
References
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Mattermost Security Updates vom 2023-10-29
https://mattermost.com/security-updates/