Vulnerability identifier: #VU29284

Vulnerability risk: Medium

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14455

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
desktop
Client/Desktop applications / Other client software

Vendor: Mattermost, Inc.

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

desktop: 0.1.0 - 4.3.2

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External links
http://mattermost.com/security-updates/
http://github.com/mattermost/desktop/commit/8f45afa080788cf3ba3fb86c7a639de012c22a54

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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.