Vulnerability identifier: #VU46877

Vulnerability risk: Medium

CVSSv3.1: 4.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-2252

CWE-ID: CWE-295

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mailer
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 does not perform hostname validation when connecting to the configured SMTP server. A remote attacker can perform a MitM attack and intercept these connections.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mailer: 1.0 - 1.32

---

External links
http://www.openwall.com/lists/oss-security/2020/09/16/3
http://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1813

---

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.