Arbitrary file read vulnerability through agent connections can lead to RCE SECURITY-3430 / CVE-2024-43044 Severity (CVSS): Critical Description: Jenkins uses the Remoting library (typically agent.jar or remoting.jar) for the communication between controller and agents. This library allows agents to load classes and classloader resources from the controller, so that Java objects sent from the controller (build steps, etc.) can be executed on agents. In addition to individual class and resource files, Remoting also allows Jenkins plugins to transmit entire jar files to agents using the Channel#preloadJar API. As of publication of this advisory, this feature is used by the following plugins distributed by the Jenkins project: bouncycastle API, Groovy, Ivy, TeamConcert In Remoting 3256.v88a_f6e922152 and earlier, except 3206.3208.v409508a_675ff and 3248.3250.v3277a_8e88c9b_, included in Jenkins 2.470 and earlier, LTS 2.452.3 and earlier, calls to Channel#preloadJar result in the retrieval of files from the controller by the agent using ClassLoaderProxy#fetchJar. Additionally, the implementation of ClassLoaderProxy#fetchJar invoked on the controller does not restrict paths that agents could request to read from the controller file system. This allows agent processes, code running on agents, and attackers with Agent/Connect permission to read arbitrary files from the Jenkins controller file system. This is a critical vulnerability as the information obtained can be used to increase access up to and including remote code execution (RCE). See SECURITY-3314 for known impacts of exploiting arbitrary file read vulnerabilities in Jenkins. Be aware that the limitation of unreadable binary data with some character encodings discussed in SECURITY-3314 does not apply to SECURITY-3430. The Remoting library in Jenkins 2.471, LTS 2.452.4, LTS 2.462.1 now sends jar file contents with Channel#preloadJar requests, the only use case of ClassLoaderProxy#fetchJar in agents, so that agents do not need to request jar file contents from controllers anymore. Missing permission check allows accessing other users' "My Views" SECURITY-3349 / CVE-2024-43045 Severity (CVSS): Medium Description: Jenkins 2.470 and earlier, LTS 2.452.3 and earlier does not perform a permission check in an HTTP endpoint. This allows attackers with Overall/Read permission to access other users' "My Views". Attackers with global View/Configure and View/Delete permissions are also able to change other users' "My Views". Jenkins 2.471, LTS 2.452.4, LTS 2.462.1 restricts access to a user’s "My Views" to the owning user and administrators.
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=a16b29185829c109b2129c3184873ab814369384 commit a16b29185829c109b2129c3184873ab814369384 Author: Hans de Graaff <graaff@gentoo.org> AuthorDate: 2024-08-14 07:45:30 +0000 Commit: Hans de Graaff <graaff@gentoo.org> CommitDate: 2024-08-14 07:48:59 +0000 dev-util/jenkins-bin: drop 2.452.3, 2.454 Bug: https://bugs.gentoo.org/937546 Signed-off-by: Hans de Graaff <graaff@gentoo.org> dev-util/jenkins-bin/Manifest | 2 -- dev-util/jenkins-bin/jenkins-bin-2.452.3.ebuild | 44 ------------------------- dev-util/jenkins-bin/jenkins-bin-2.454.ebuild | 44 ------------------------- 3 files changed, 90 deletions(-)
