FilePath#listFiles lists files outside directories that agents are allowed to access when following symbolic links in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
Weakness
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Jenkins | Jenkins | * | 2.303.3 (excluding) |
| Jenkins | Jenkins | * | 2.319 (excluding) |
| Red Hat OpenShift Container Platform 3.11 | RedHat | jenkins-0:2.303.3.1637698110-1.el7 | * |
| Red Hat OpenShift Container Platform 4.6 | RedHat | jenkins-0:2.303.3.1637597493-1.el8 | * |
| Red Hat OpenShift Container Platform 4.7 | RedHat | jenkins-0:2.303.3.1637597018-1.el8 | * |
| Red Hat OpenShift Container Platform 4.8 | RedHat | jenkins-0:2.303.3.1637596565-1.el8 | * |
| Red Hat OpenShift Container Platform 4.9 | RedHat | jenkins-0:2.303.3.1637595827-1.el8 | * |
Potential Mitigations
- Follow the principle of least privilege when assigning access rights to entities in a software system.
- Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/132.html
- https://cwe.mitre.org/data/definitions/17.html
- https://cwe.mitre.org/data/definitions/35.html
- https://cwe.mitre.org/data/definitions/76.html