Vulnerability identifier: #VU24764

Vulnerability risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-2105

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jenkins
Server applications / Application servers
Jenkins LTS
Server applications / Application servers

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to perform a clickjacking attack

The vulnerability exists due to the affected software does not serve the "X-Frame-Options: deny" HTTP header on REST API responses to protect against clickjacking attacks. A remote attacker can rout the victim through a specially crafted web page that embeds a REST API endpoint in an iframe and trick the user to perform an action which would allow for the attacker to learn the content of that REST API endpoint.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jenkins: 2.0 - 2.218

Jenkins LTS: 2.7.1 - 2.204.1

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External links
http://www.openwall.com/lists/oss-security/2020/01/29/1
http://jenkins.io/security/advisory/2020-01-29/#SECURITY-1704

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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.