CloudBees Security Advisory 2019-04-30

This advisory announces vulnerabilities in Jenkins.

SECURITY-1100 / CVE-2019-10307 (CSRF) and CVE-2019-10308 (permission check)

Static Analysis Utilities Plugin has the capability to allow other plugins to display trend graphs for their static analysis results. Static Analysis Utilities Plugin provides the configuration form for the default settings of each graph.

The configuration form and form submission handler did not perform a permission check, allowing attackers with Job/Read access to change the per-job graph configuration defaults for all users.

Additionally, the form submission handler did not require POST requests, resulting in a cross-site request forgery vulnerability.

Static Analysis Utilities Plugin now requires Job/Configure permission and POST requests to configure the per-job graph defaults for all users.

SECURITY-930 / CVE-2019-10317

SiteMonitor Plugin unconditionally disables SSL/TLS certificate validation for the entire Jenkins master JVM.

SiteMonitor Plugin no longer does that. Instead, it now has an opt-in option to ignore SSL/TLS errors for each site check individually.

SECURITY-1252 / CVE-2019-10309

Self-Organizing Swarm Plug-in Modules Plugin allows clients to auto-discover Jenkins instances on the same network through a UDP discovery request. Responses to this request are XML documents.

Self-Organizing Swarm Plug-in Modules Plugin does not configure the XML parser in a way that would prevent XML External Entity (XXE) processing. This allows unauthenticated attackers on the same network to have Swarm clients parse a maliciously crafted XML response that uses external entities to read arbitrary files from the Swarm client or denial-of-service attacks.

As of publication of this advisory, there is no fix.

SECURITY-1355 (1) / CVE-2019-10310 (CSRF) and CVE-2019-10311 (permission check)

Ansible Tower 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 URL using attacker-specified credentials IDs obtained through another method, capturing credentials stored in Jenkins.

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-1355 (2) / CVE-2019-10312

Ansible Tower Plugin provides a list of applicable credential IDs to allow users 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-1390 / CVE-2019-10318

Azure AD Plugin stored the client secret unencrypted in the global config.xml configuration file on the Jenkins master. These credentials could be viewed by users with access to the master file system.

Azure AD Plugin now stores the client secret encrypted.

SECURITY-1143 / CVE-2019-10313

Twitter Plugin stores credentials unencrypted in its global configuration file on the Jenkins master. These credentials could be viewed by users with access to the master file system.

As of publication of this advisory, there is no fix.

SECURITY-936 / CVE-2019-10314

Koji Plugin unconditionally disables SSL/TLS certificate validation for the entire Jenkins master JVM.

As of publication of this advisory, there is no fix.

SECURITY-443 / CVE-2019-10315

GitHub Authentication Plugin did not manage the state parameter of OAuth to prevent CSRF. This allowed an attacker to catch the redirect URL provided during the authentication process using OAuth and send it to the victim. If the victim was already connected to Jenkins, their Jenkins account would be attached to the attacker’s GitHub account.

The state parameter is now correctly managed.

SECURITY-1380 / CVE-2019-10316

Aqua MicroScanner Plugin stored credentials unencrypted in its global configuration file on the Jenkins master. These credentials could be viewed by users with access to the master file system.

Aqua MicroScanner Plugin now stores credentials encrypted.

• SECURITY-443: Medium

• SECURITY-930: Medium

• SECURITY-936: Medium

• SECURITY-1100: Medium

• SECURITY-1143: Low

• SECURITY-1252: Medium

• SECURITY-1355 (1): Medium

• SECURITY-1355 (2): Medium

• SECURITY-1380: Low

• SECURITY-1390: Low

• Ansible Tower Plugin should be updated to version 0.9.2

• Aqua MicroScanner Plugin should be updated to version 1.0.6

• Azure AD Plugin should be updated to version 0.3.4

• GitHub Authentication Plugin should be updated to version 0.32

• SiteMonitor Plugin should be updated to version 0.6

• Static Analysis Utilities Plugin should be updated to version 1.96

These versions include fixes to the vulnerabilities described above. All prior versions are considered to be affected by these vulnerabilities unless otherwise indicated.

As of publication of this advisory, no fixes are available for the following plugins:

• Koji Plugin

• Self-Organizing Swarm Plug-in Modules Plugin

• Twitter Plugin