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Date: Thu, 10 Jun 2021 16:19:43 +0200
From: Daniel Beck <ml@...kweb.net>
To: oss-security@...ts.openwall.com
Subject: Multiple vulnerabilities in Jenkins plugins
Jenkins is an open source automation server which enables developers around
the world to reliably build, test, and deploy their software.
The following releases contain fixes for security vulnerabilities:
* Kiuwan Plugin 1.6.1
* Kubernetes CLI Plugin 1.10.1
* XebiaLabs XL Deploy Plugin 10.0.2
Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://www.jenkins.io/security/advisory/2021-06-10/
We provide advance notification for security updates on this mailing list:
https://groups.google.com/d/forum/jenkinsci-advisories
If you discover security vulnerabilities in Jenkins, please report them as
described here:
https://www.jenkins.io/security/#reporting-vulnerabilities
---
SECURITY-2370 / CVE-2021-21661
Kubernetes CLI Plugin 1.10.0 and earlier does not perform permission checks
in several HTTP endpoints.
This allows attackers with Overall/Read permission to enumerate credentials
IDs of credentials stored in Jenkins. Those can be used as part of an
attack to capture the credentials using another vulnerability.
SECURITY-1981 / CVE-2021-21662
XebiaLabs XL Deploy Plugin 10.0.1 and earlier does not perform a permission
check in a method implementing form validation.
This allows attackers with Overall/Read permission to enumerate credentials
IDs of credentials stored in Jenkins. Those can be used as part of an
attack to capture the credentials using another vulnerability.
SECURITY-1982 / CVE-2021-21663 (missing permission check) & CVE-2021-21664 (incorrect permission check) & CVE-2021-21665 (CSRF)
XebiaLabs XL Deploy Plugin 10.0.1 and earlier does not (correctly) perform
a permission check in a method implementing form validation.
This allows attackers with Overall/Read permission to connect to an
attacker-specified URL using attacker-specified credentials IDs obtained
through another method, capturing Username/password credentials stored in
Jenkins.
Additionally, this form validation method does not require POST requests,
resulting in a cross-site request forgery (CSRF) vulnerability.
SECURITY-2367 / CVE-2021-21666
Kiuwan Plugin 1.6.0 and earlier does not escape output that can indirectly
be controlled through query parameters in an error message for a form
validation endpoint.
This results in a reflected cross-site scripting (XSS) vulnerability.
NOTE: Only older releases of Jenkins are affected by this vulnerability.
Jenkins 2.275 and newer, LTS 2.263.2 and newer include a protection
preventing this from being exploitable.
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