Resource exhaustion in Mattermost Server - CVE-2018-21250
Published: June 19, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30225
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-21250
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
An issue was discovered in Mattermost Server before 5.2.2, 5.1.2, and 4.10.4. It allows remote attackers to cause a denial of service (memory consumption) via crafted image dimensions.
Affected software
Mattermost Server
How to mitigate CVE-2018-21250
Install update from vendor's website.
Mattermost Server - update to 5.2.2