CVE-2023-27480 – org.xwiki.platform:xwiki-platform-xar-model

Package

Manager: maven
Name: org.xwiki.platform:xwiki-platform-xar-model
Vulnerable Version: >=1.1-milestone-3 <13.10.11 || >=14.0 <14.4.7 || >=14.5 <14.10-rc-1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00937 pctl0.75313

Details

XWiki Platform vulnerable to data leak via Improper Restriction of XML External Entity Reference ### Impact Any user with edit rights on a document can trigger a XAR import on a forged XAR file, leading to the ability to display the content of any file on the XWiki server host. Example to reproduce: * Create a forget XAR file and inside it, have the following `package.xml` content: ```xml <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE foo [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]> <package> <infos> <name>&xxe;</name> <description> &xxe; Helper pages for creating and listing Class/Template/Sheets</description> <licence></licence> <author>XWiki.Admin</author> ... ``` * Upload it onto a wiki page (e.g. `XXE`) as an attachment (e.g. `test.xar`). * Call the page using `http://localhost:8080/xwiki/bin/view/Main/XXE?sheet=XWiki.AdminImportSheet&file=test.xar` You'll then notice that the displayed UI contains the content of the `/etc/passwd` file. ### Patches The vulnerability has been patched in XWiki 13.10.11, 14.4.7 and 14.10-rc-1. ### Workarounds You'd need to get XWiki Platform sources and apply the changes from https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434 to the `XarPackage` java class and then copy the modified version to your `WEB-INF/classes` directory (or rebuild the `xwiki-platform-xar-model` maven module and replace the one found in `WEB-INF/lib/`). ### References * https://github.com/xwiki/xwiki-platform/commit/e3527b98fdd8dc8179c24dc55e662b2c55199434 * https://jira.xwiki.org/browse/XWIKI-20320 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki.org](https://jira.xwiki.org/) * Email us at [Security Mailing List](mailto:security@xwiki.org)

Metadata

Created: 2023-03-08T17:19:30Z
Modified: 2023-03-08T17:19:30Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/03/GHSA-gx4f-976g-7g6v/GHSA-gx4f-976g-7g6v.json
CWE IDs: ["CWE-611"]
Alternative ID: GHSA-gx4f-976g-7g6v
Finding: F083
Auto approve: 1