Vulnerability identifier: #VU27613

Vulnerability risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-2187

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Amazon EC2
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to the affected plugin unconditionally accepts self-signed HTTPS certificates and does not perform hostname validation when connecting to Windows agents. A remote attacker can perform a man-in-the-middle attack and intercept these connections to build agents.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Amazon EC2: 1.0 - 1.50.1

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External links
http://www.openwall.com/lists/oss-security/2020/05/06/3
http://jenkins.io/security/advisory/2020-05-06/#SECURITY-1528

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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.