XWiki Platform has path traversal via resources parameter in ssx and jsx endpoints when using leading slash

Impact

It's possible to get access and read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false.

This can apparently be reproduced on Tomcat instances.

Patches

This has been patched in 18.0.0-rc-1, 17.10.3, 17.4.9, 16.10.17.

Workarounds

There is no known workaround, other than upgrading XWiki.

References

• https://jira.xwiki.org/browse/XCOMMONS-3547
• https://github.com/xwiki/xwiki-commons/commit/a979cafd89f6a9c9c0b9ab19744d672df64429bf

For more information

If you have any questions or comments about this advisory:

• Open an issue in Jira XWiki.org
• Email us at Security Mailing List

Attribution

The vulnerability was reported by Michał Kołek.