XWiki vulnerable to Denial of Service attack through attachments

Impact

A user able to attach a file to a page can post a malformed TAR file by manipulating file modification times headers, which when parsed by Tika, could cause a denial of service issue via CPU consumption.

Patches

This vulnerability has been patched in XWiki 14.10.18, 15.5.3 and 15.8 RC1.

Workarounds

The workaround is to download commons-compress 1.24 and replace the one located in XWiki WEB-INF/lib/ folder.

References

https://jira.xwiki.org/browse/XCOMMONS-2796

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