Insufficient Entropy in Mattermost Server - CVE-2017-18883
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30195
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-18883
CWE-ID: CWE-331
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Affected software
Mattermost Server
How to mitigate CVE-2017-18883
Install update from vendor's website.
Mattermost Server - update to 4.2.1