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Date: Wed, 6 Mar 2019 15:41:34 +0100
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:
* AppDynamics Dashboard Plugin 1.0.15
* Azure VM Agents Plugin 0.8.1
* Bitbar Run-in-Cloud Plugin 2.70.0
* Email Extension Plugin 2.65
* Groovy Plugin 2.2
* Job DSL Plugin 1.72
* Matrix Project Plugin 1.14
* OSF Builder Suite For Salesforce Commerce Cloud :: Deploy Plugin 1.0.11
* Pipeline: Groovy Plugin 2.64
* Rabbit-MQ Publisher Plugin 1.2.0
* Repository Connector Plugin 1.2.5
* Script Security Plugin 1.54
Summaries of the vulnerabilities are below. More details, severity, and
attribution can be found here:
https://jenkins.io/security/advisory/2019-03-06/
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-1336 (1)
Script Security sandbox protection could be circumvented during parsing,
compilation, and script instantiation by providing a crafted Groovy script.
Script Security Plugin is now newly applying sandbox protection during
these phases.
This affected both script execution (typically invoked from other plugins)
as well as an HTTP endpoint providing script validation and allowed users
with Overall/Read permission to bypass the sandbox protection and execute
arbitrary code on the Jenkins master.
The API `GroovySandbox#run(Script, Whitelist)` has been deprecated and now
emits a warning to the system log about potential security problems.
`GroovySandbox#run(GroovyShell, String, Whitelist)` replaces it.
`GroovySandbox#checkScriptForCompilationErrors(String, GroovyClassLoader)`
has been added as a safer method to implement script validation.
SECURITY-1336 (2)
Pipeline: Groovy sandbox protection could be circumvented during parsing,
compilation, and script instantiation by providing a crafted Groovy script.
This allowed users able to control the contents of a pipeline to bypass
the sandbox protection and execute arbitrary code on the Jenkins master.
Pipeline: Groovy Plugin now uses Script Security APIs that apply sandbox
protection during these phases.
SECURITY-1339
Matrix Project Plugin supports a sandboxed Groovy expression to filter
matrix combinations. Its sandbox protection could be circumvented during
parsing, compilation, and script instantiation by providing a crafted
Groovy script.
This allowed users able to configure a Matrix project to bypass the
sandbox protection and execute arbitrary code on the Jenkins master.
Matrix Project Plugin now uses Script Security APIs that apply sandbox
protection during these phases.
SECURITY-1340
Email Extension Plugin supports sandboxed Groovy expressions for multiple
features. Its sandbox protection could be circumvented during parsing,
compilation, and script instantiation by providing a crafted Groovy script.
This allowed users able to control the plugin’s job-specific configuration
to bypass the sandbox protection and execute arbitrary code on the Jenkins
master.
Email Extension Plugin now uses Script Security APIs that apply sandbox
protection during these phases.
SECURITY-1338
Groovy Plugin supports sandboxed Groovy expressions for its "System
Groovy" functionality. Its sandbox protection could be circumvented during
parsing, compilation, and script instantiation by providing a crafted
Groovy script.
This affected both System Groovy script execution as well as an HTTP
endpoint providing script validation, and allowed users with Overall/Read
permission to bypass the sandbox protection and execute arbitrary code on
the Jenkins master.
Groovy Plugin now uses Script Security APIs that apply sandbox protection
during these phases.
SECURITY-1342
Job DSL Plugin supports sandboxed Groovy expressions for Job DSL
definitions. Its sandbox protection could be circumvented during parsing,
compilation, and script instantiation by providing a crafted Groovy script.
This allowed users able to control the Job DSL scripts to bypass the
sandbox protection and execute arbitrary code on the Jenkins master.
Job DSL Plugin now uses Script Security APIs that apply sandbox protection
during these phases.
SECURITY-1330
A missing permission check in a form validation method in Azure VM Agents
Plugin allowed users with Overall/Read access to verify a submitted
configuration, obtaining limited information about the Azure account and
configuration.
Additionally, this form validation method did not require POST requests,
resulting in a potential CSRF vulnerability.
This form validation method now requires POST requests and
Overall/Administer permissions.
SECURITY-1331
A missing permission check in an HTTP endpoint allowed users with
Overall/Read access to attach a public IP address to an Azure VM in Azure
VM Agents Plugin, making a virtual machine publicly accessible.
Additionally, this form validation method did not require POST requests,
resulting in a CSRF vulnerability with more limited impact, as the IP
address would not be known.
This form validation method now requires POST requests and
Overall/Administer permissions.
SECURITY-1332
Azure VM Agents Plugin provides a list of applicable credential IDs to
allow administrators configuring the plugin to select the one to use.
This functionality did not check permissions, allowing any user with
Overall/Read permission to get a list of valid credentials IDs. Those
could be used as part of an attack to capture the credentials using
another vulnerability.
An enumeration of credentials IDs in this plugin now requires
Overall/Administer permission.
SECURITY-958
Repository Connector Plugin stored the username and password in its
configuration unencrypted in its global configuration file on the Jenkins
master. This password could be viewed by users with access to the master
file system.
The plugin now stores the password encrypted in the configuration files on
disk and no longer transfers it to users viewing the configuration form in
plain text.
SECURITY-1087
AppDynamics Dashboard Plugin stored username and password in its
configuration unencrypted in jobs' config.xml files on the Jenkins master.
This password could be viewed by users with Extended Read permission, or
access to the master file system.
While masked from view using a password form field, the password was
transferred in plain text to users when accessing the job configuration
form.
AppDynamics Dashboard Plugin now stores the password encrypted in the
configuration files on disk and no longer transfers it to users viewing
the configuration form in plain text. Existing jobs need to have their
configuration saved for existing plain text passwords to be overwritten.
SECURITY-848
Rabbit-MQ Publisher Plugin stored the username and password in its
configuration unencrypted in its global configuration file on the Jenkins
master. This password could be viewed by users with access to the master
file system.
The plugin now stores the password encrypted in the configuration files on
disk and no longer transfers it to users viewing the configuration form in
plain text.
SECURITY-970
A missing permission check in a form validation method of Rabbit-MQ
Publisher Plugin allowed users with Overall/Read access to have Jenkins
initiate a RabbitMQ connection to an attacker-specified host and port with
an attacker-specified username and password.
Additionally, this 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-1038
OSF Builder Suite For Salesforce Commerce Cloud : : Deploy Plugin stored
the HTTP proxy username and password in its configuration unencrypted in
its global configuration file on the Jenkins master. This password could
be viewed by users with access to the master file system.
The plugin now integrates with Credentials Plugin to store the HTTP proxy
credentials.
SECURITY-1088
A missing permission check in a method performing both form validation and
saving new configuration in Bitbar Run-in-Cloud Plugin allowed users with
Overall/Read permission to have Jenkins master connect to an attacker-
specified host with attacker-specified credentials, and, if successful,
save that as the new configuration for the plugin. This could then
potentially result in future builds submitting their data to an
unauthorized remote server.
Additionally, this method did not require POST requests, resulting in a
CSRF vulnerability.
This form validation method now requires POST requests and
Overall/Administer permissions.
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