Date: Mon, 5 Feb 2018 13:17:40 +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 plugin releases contain fixes for security vulnerabilities: * Android Lint 2.6 * CCM 3.2 * Credentials Binding 1.15 * JUnit 1.24 * Pipeline: Supporting APIs 2.18 Summaries of the vulnerabilities are below. More details, severity, and attribution can be found here: https://jenkins.io/security/advisory/2018-02-05/ We provide advance notification for security updates on this mailing list: https://groups.google.com/d/forum/jenkinsci-advisories If you find security vulnerabilities in Jenkins, please report them as described here: https://jenkins.io/security/#reporting-vulnerabilities --- SECURITY-521 JUnit plugin is affected by an XML External Entity (XXE) processing vulnerability. This allows an attacker to configure build processes such that JUnit plugin parses a maliciously crafted file that uses external entities for extraction of secrets from the Jenkins master, server-side request forgery, or denial-of-service attacks. SECURITY-659 (CCM) SECURITY-660 (Android Lint) Multiple plugins based on Static Analysis Utilities plugin are affected by an XML External Entity (XXE) processing vulnerability. This allows an attacker to configure build processes such that one of these plugins parses a maliciously crafted file that uses external entities for extraction of secrets from the Jenkins master, server-side request forgery, or denial-of-service attacks. SECURITY-698 Credentials Binding plugin allows specifying passwords and other secrets as environment variables, and will hide them from console output in builds. However, since Jenkins will try to resolve references to other environment variables in environment variables passed to a build, this can result in other values than the one specified being provided to a build. For example, the value p4$$w0rd would result in Jenkins passing on p4$w0rd, as $$ is the escape sequence for a single $. Credentials Binding plugin does not prevent such a transformed value (e.g. p4$w0rd) from being shown on the build log, allowing users to reconstruct the actual password value from the transformed one. Credentials Binding plugin will now escape any $ characters in password values so they are correctly passed to the build. SECURITY-699 Arbitrary code execution due to incomplete sandbox protection in Pipeline: Supporting APIs Plugin: Methods related to Java deserialization like readResolve implemented in Pipeline scripts were not subject to sandbox protection, and could therefore execute arbitrary code. This could be exploited e.g. by regular Jenkins users with the permission to configure Pipelines in Jenkins, or by trusted committers to repositories containing Jenkinsfiles. Deserialization of objects in Pipeline is now also subject to sandbox protection.
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