An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2, when serving as an OAuth 2.0 Service Provider. There is low entropy for authorization data.
Weakness
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Mattermost_server | Mattermost | * | 4.1.2 (excluding) |
| Mattermost_server | Mattermost | 4.2.0 (including) | 4.2.1 (excluding) |
| Mattermost_server | Mattermost | 4.3.0-rc1 (including) | 4.3.0-rc1 (including) |
| Mattermost_server | Mattermost | 4.3.0-rc2 (including) | 4.3.0-rc2 (including) |
| Mattermost_server | Mattermost | 4.3.0-rc3 (including) | 4.3.0-rc3 (including) |
| Mattermost_server | Mattermost | 4.3.0-rc4 (including) | 4.3.0-rc4 (including) |