Multiple vulnerabilities in Mattermost Desktop application

Published: 2020-06-25

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-14455 CVE-2020-14456
CWE-ID	CWE-287
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Mattermost Desktop App Client/Desktop applications / Other client software
Vendor	Mattermost, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper Authentication

EUVDB-ID: #VU29284

Risk: Medium

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-14455

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to the prompting for HTTP Basic Authentication is mishandled, allowing phishing. A remote attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mattermost Desktop App: 0.1.0 - 4.3.2

CPE2.3

External links

https://mattermost.com/security-updates/
https://github.com/mattermost/desktop/commit/8f45afa080788cf3ba3fb86c7a639de012c22a54

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper Authentication

EUVDB-ID: #VU29285