Description
Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | ≤ 8.1.7, ≤ 9.1.4, ≤ 9.2.3 | 9.3.0 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 9.1.0+incompatible, < 9.1.5+incompatible · >= 9.2.0+incompatible, < 9.2.4+incompatible | 9.1.5+incompatible, 9.2.4+incompatible | GO-2024-2541 |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2024-2541 |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2024-2541 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.1.8 | 8.1.8 | GHSA-32h7-7j94-8fc2 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.2.0, < 9.2.4 | 9.2.4 | GHSA-32h7-7j94-8fc2 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.1.0, < 9.1.5 | 9.1.5 | GHSA-32h7-7j94-8fc2 |
| Go | github.com/mattermost/mattermost/server/v8 | all versions | — | GO-2024-2541 |
Advisories 1
- WID-SEC-2024-0035 Mattermost: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Feb 11, 2024