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CVSS: 9.0EPSS: 0%CPEs: 2EXPL: 0

File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories. Los filtros de rutas de archivos en el subsistema de seguridad agente-a-controlador de Jenkins versiones 2.318 y anteriores, LTS versiones 2.303.2 y anteriores, no canonizan las rutas, permitiendo que las operaciones sigan enlaces simbólicos a directorios no permitidos A link following vulnerability was found in Jenkins. The file path filters do not canonicalize paths allowing operations to follow symbolic links to directories they are not supposed to have access to. This may allow an attacker to read and write arbitrary files on the Jenkins controller file system. • https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 https://access.redhat.com/security/cve/CVE-2021-21686 https://bugzilla.redhat.com/show_bug.cgi?id=2020323 • CWE-59: Improper Link Resolution Before File Access ('Link Following') •

CVSS: 9.1EPSS: 0%CPEs: 2EXPL: 0

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create parent directories in FilePath#mkdirs. Jenkins versiones 2.318 y anteriores, LTS versiones 2.303.2 y anteriores, no comprueban el acceso de agente a controlador para crear directorios padre en FilePath#mkdirs An incorrect permissions validation vulnerability was found in Jenkins. The FilePath#mkdirs does not check permission to create parent directories, which may allow an attacker who controls the agent process to get read and write arbitrary files on the Jenkins controller file system. • http://www.openwall.com/lists/oss-security/2021/11/04/3 https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 https://access.redhat.com/security/cve/CVE-2021-21685 https://bugzilla.redhat.com/show_bug.cgi?id=2020322 • CWE-281: Improper Preservation of Permissions CWE-862: Missing Authorization •

CVSS: 9.8EPSS: 0%CPEs: 2EXPL: 0

When creating temporary files, agent-to-controller access to create those files is only checked after they've been created in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier. Cuando son creados archivos temporales, el acceso de agente a controlador para crear esos archivos sólo se comprueba después de haberlos creado en Jenkins versiones 2.318 y anteriores, LTS versiones 2.303.2 y anteriores An incorrect permissions validation vulnerability was found in Jenkins. The permissions to create temporary files are only checked after they have been created. This may allow an attacker to get access to restricted data. • https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455 https://access.redhat.com/security/cve/CVE-2021-21693 https://bugzilla.redhat.com/show_bug.cgi?id=2020341 • CWE-276: Incorrect Default Permissions CWE-863: Incorrect Authorization •

CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 0

The file browser in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier may interpret some paths to files as absolute on Windows, resulting in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files. El navegador de archivos en Jenkins versiones 2.314 y anteriores, LTS versiones 2.303.1 y anteriores, puede interpretar algunas rutas de archivos como absolutas en Windows, resultando en una vulnerabilidad de salto de ruta que permite a atacantes con permiso de Overall/Read (controlador de Windows) o permiso de Job/Workspace (agentes de Windows) obtener el contenido de archivos arbitrarios • http://www.openwall.com/lists/oss-security/2021/10/06/1 https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2481 • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •

CVSS: 4.3EPSS: 0%CPEs: 3EXPL: 0

Jenkins 2.314 and earlier, LTS 2.303.1 and earlier accepts names of jobs and other entities with a trailing dot character, potentially replacing the configuration and data of other entities on Windows. Jenkins versiones 2.314 y anteriores, LTS versiones 2.303.1 y anteriores, aceptan nombres de trabajos y otras entidades con un carácter de punto al final, reemplazando potencialmente la configuración y los datos de otras entidades en Windows • http://www.openwall.com/lists/oss-security/2021/10/06/1 https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2424 •