Icinga Web 2 is an open source monitoring web interface, framework and command-line interface. Between versions 2.3.0 and 2.8.2, the `doc` module of Icinga Web 2 allows to view documentation directly in the UI. It must be enabled manually by an administrator and users need explicit access permission to use it. Then, by visiting a certain route, it is possible to gain access to arbitrary files readable by the web-server user. The issue has been fixed in the 2.9.0, 2.8.3, and 2.7.5 releases. As a workaround, an administrator may disable the `doc` module or revoke permission to use it from all users.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://github.com/Icinga/icingaweb2/security/advisories/GHSA-cmgc-h4cx-3v43 | third party advisory exploit |
| https://github.com/Icinga/icingaweb2/releases/tag/v2.7.5 | third party advisory release notes |
| https://github.com/Icinga/icingaweb2/releases/tag/v2.8.3 | third party advisory release notes |
| https://github.com/Icinga/icingaweb2/releases/tag/v2.9.0 | third party advisory release notes |