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Date: Tue, 11 Jun 2019 15:10:00 +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:
* ElectricFlow Plugin 1.1.7
* JX Resources Plugin 1.0.37
* Token Macro Plugin 2.8
Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://jenkins.io/security/advisory/2019-06-11/
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://jenkins.io/security/#reporting-vulnerabilities
---
SECURITY-1399 / CVE-2019-10337
Token Macro Plugin did not configure its XML parser in a way that would
prevent XML External Entity (XXE) processing.
This allowed attackers able to control the contents of files processed with
the ${XML} macro to have Jenkins parse a maliciously crafted XML file that
uses external entities for extraction of secrets from the Jenkins agent,
server-side request forgery, or denial-of-service attacks.
Token Macro Plugin no longer processes XML External Entities in XML documents.
SECURITY-1379 / CVE-2019-10338 (CSRF), CVE-2019-10339 (improper authorization)
JX Resources Plugin did not perform permission checks on a method
implementing form validation. This allowed users with Overall/Read access to
Jenkins to connect to an attacker-specified Kubernetes server and obtain
information about an attacker-specified namespace. Doing so might also leak
service account credentials used for the connection. Additionally, it allowed
attackers to obtain the value of any attacker-specified environment variable
for the Jenkins master process.
Additionally, this form validation method did not require POST requests,
resulting in a cross-site request forgery vulnerability.
This form validation method now requires POST requests and Overall/Administer
permissions.
SECURITY-1410 (1) / CVE-2019-10331 (CSRF), CVE-2019-10332 (improper authorization)
A missing permission check in a form validation method in ElectricFlow Plugin
allowed users with Overall/Read permission to initiate a connection test to
an attacker-specified server with attacker-specified username and password.
Additionally, the form validation method did not require POST requests,
resulting in a CSRF vulnerability.
This form validation method now requires POST requests and Overall/Administer
permissions.
SECURITY-1410 (2) / CVE-2019-10333
Various form validation and form autocompletion methods in ElectricFlow
Plugin lacked permission checks. This allowed attackers with Overall/Read
access to obtain information about the configuration of ElectricFlow Plugin,
as well as the configuration and data of connected ElectricFlow servers.
These form validation and autocompletion methods now require
Overall/Administer or Job/Configure permission, as appropriate for the given
method.
SECURITY-1411 / CVE-2019-10334
ElectricFlow Plugin unconditionally disabled SSL/TLS certificate validation
for the entire Jenkins master JVM during the deployment/publication of an
application.
ElectricFlow Plugin no longer does that. Instead, the existing opt-in option to
ignore SSL/TLS errors is used during deployment for the specific connection.
SECURITY-1412 / CVE-2019-10335
The plugin adds metadata displayed on build pages during its operations.
Any user content was not escaped, resulting in a cross-site scripting
vulnerability allowing users with Job/Configure permission, or attackers
controlling API responses received from ElectricFlow to render arbitrary HTML
and JavaScript on Jenkins build pages.
Build metadata is now filtered through a HTML formatter that only allows
showing basic HTML, neutralizing any unsafe data. Additionally, all builds
executed after the security update is applied will now properly escape
content received from ElectricFlow.
SECURITY-1420 / CVE-2019-10336
The configuration forms of various post-build steps contributed by
ElectricFlow Plugin were vulnerable to cross-site scripting.
This allowed attackers able to control the output of connected ElectricFlow
servers' APIs to inject arbitrary HTML and JavaScript into the configuration
form.
ElectricFlow Plugin no longer interprets HTML/JavaScript in responses from
ElectricFlow server APIs on job configuration forms.
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