Affected: Bitnami: jenkins

Jenkins LTS 2.426.2 and earlier does not disable a feature of its CLI command parser that replaces an '@' character followed by a file path in an argument with the file's contents, allowing unauthenticated attackers to read arbitrary files on the Jenkins controller file system.

Jenkins 2.441 and earlier, LTS 2.426.2 and earlier does not disable a feature of its CLI command parser that replaces an '@' character followed by a file path in an argument with the file's contents, allowing unauthenticated attackers to read arbitrary files on the Jenkins controller file system.

Affected: Maven: org.jenkins-ci.main:jenkins-core

Jenkins has a built-in command line interface (CLI) to access Jenkins from a script or shell environment.

Jenkins uses the args4j library to parse command arguments and options on the Jenkins controller when processing CLI commands. This command parser has a feature that replaces an @ character followed by a file path in an argument with the file’s contents (expandAtFiles). This feature is enabled by default and Jenkins 2.441 and earlier, LTS 2.426.2 and earlier does not disable it.

This allows attackers to read arbitrary files on the Jenkins controller file system using the default character encoding of the Jenkins controller process.

* Attackers with Overall/Read permission can read entire files.

* Attackers without Overall/Read permission can read the first few lines of files. The number of lines that can be read depends on available CLI commands. As of publication of this advisory, the Jenkins security team has found ways to read the first three lines of files in recent releases of Jenkins without having any plugins installed, and has not identified any plugins that would increase this line count.

Binary files containing cryptographic keys used for various Jenkins features can also be read, with some limitations (see note on binary files below). As of publication, the Jenkins security team has confirmed the following possible attacks in addition to reading contents of all files with a known file path. All of them leverage attackers' ability to obtain cryptographic k…

SnakeYaml: Constructor Deserialization Remote Code Execution maven-shared-utils: Command injection via Commandline class apache-commons-text: variable interpolation RCE jenkins-2-plugins/script-security: Sandbox bypass vulnerability in Script Security Plugin jenkins-2-plugins/JUnit: Stored XSS vulnerability in JUnit Plugin jenkins-2-plugins/pipeline-build-step: Stored XSS vulnerability in Pipeline: Build Step Plugin Jenkins: Temporary file parameter created with insecure permissions Jenkins: Information disclosure through error stack traces related to agents Jenkins: Session fixation vulnerability in OpenShift Login Plugin jenkins: Arbitrary file read vulnerability through the CLI can lead to RCE jenkins: cross-site WebSocket hijacking

Ein entfernter Angreifer kann mehrere Schwachstellen in Jenkins ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Dateien zu manipulieren oder Cross-Site Scripting (XSS)-Angriffe durchzuführen.