Jenkins Enterprise and Operations Center < / / 2.303.2.5 Multiple Vulnerabilities (CloudBees Security Advisory 2021-10-06)

medium Nessus Plugin ID 155661
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A job scheduling and management system hosted on the remote web server is affected by multiple vulnerabilities.


The version of Jenkins Enterprise or Jenkins Operations Center running on the remote web server is 2.249.x prior to, 2.277.x prior to, or 2.x prior to 2.303.2.5. It is, therefore, affected by multiple vulnerabilities, including the following:

- org.apache.http.conn.ssl.AbstractVerifier in Apache HttpComponents HttpClient before 4.3.5 and HttpAsyncClient before 4.0.2 does not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a 'CN=' string in a field in the distinguished name (DN) of a certificate, as demonstrated by the 'foo,' string in the O field.

- Jenkins 2.314 and earlier, LTS 2.303.1 and earlier accepts names of jobs and other entities with a trailing dot character, potentially replacing the configuration and data of other entities on Windows.

- The file browser in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier may interpret some paths to files as absolute on Windows, resulting in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files. (CVE-2021-21683)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade Jenkins Enterprise or Jenkins Operations Center to version,, 2.303.2.5, or later.

See Also

Plugin Details

Severity: Medium

ID: 155661

File Name: cloudbees_security_advisory_2021-10-06.nasl

Version: 1.2

Type: combined

Agent: windows, macosx, unix

Family: CGI abuses

Published: 11/22/2021

Updated: 11/23/2021

Dependencies: jenkins_detect.nasl, jenkins_win_installed.nbin, jenkins_nix_installed.nbin, macosx_jenkins_installed.nbin

Risk Information

CVSS Score Source: CVE-2014-3577


Risk Factor: Low

Score: 3.7


Risk Factor: Medium

Base Score: 5.8

Temporal Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:cloudbees:jenkins:*:*:*:*:*:*:*:*

Required KB Items: installed_sw/Jenkins

Exploit Ease: No known exploits are available

Patch Publication Date: 10/6/2021

Vulnerability Publication Date: 10/6/2021

Reference Information

CVE: CVE-2014-3577, CVE-2021-21682, CVE-2021-21684, CVE-2021-21683