org.xwiki.platform:xwiki-platform-office-importer vulnerable to arbitrary server side file writing from account through office converter

Summary

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Starting in version 3.5-milestone-1 and prior to versions 14.10.8 and 15.3-rc-1, triggering the office converter with a specially crafted file name allows writing the attachment's content to an attacker-controlled location on the server as long as the Java process has write access to that location. In particular in the combination with attachment moving, a feature introduced in XWiki 14.0, this is easy to reproduce but it also possible to reproduce in versions as old as XWiki 3.5 by uploading the attachment through the REST API which doesn't remove `/` or `\` from the filename. As the mime type of the attachment doesn't matter for the exploitation, this could e.g., be used to replace the `jar`-file of an extension which would allow executing arbitrary Java code and thus impact the confidentiality, integrity and availability of the XWiki installation. This vulnerability has been patched in XWiki 14.10.8 and 15.3RC1. There are no known workarounds apart from disabling the office converter.

Timeline

1. Oct 25, 2023, 5:59 PM UTCCVE published
2. Sep 10, 2024, 6:32 PM UTCCISA SSVC assessment

   Exploitation: poc · Automatable: no · Technical impact: total

3. Sep 12, 2024, 8:46 PM UTCRecord last updated

Affected versions

• xwiki xwiki-platform

  From 3.5-milestone-1 · fixed in 14.10.8; From 15.0-rc-1 · fixed in 15.3-rc-1

• org.xwiki.platform:xwiki-platform-office-importerMaven

  From 3.5-milestone-1 · fixed in 14.10.8

• org.xwiki.platform:xwiki-platform-office-importerMaven

  From 15.0-rc-1 · fixed in 15.3-rc-1

References 3