The XWiki JIRA extension allows data leak through an XXE attack by using a fake JIRA server

Impact

If the JIRA macro is installed, any logged in XWiki user could edit his/her user profile wiki page and use that JIRA macro, specifying a fake JIRA URL that returns an XML specifying a DOCTYPE pointing to a local file on the XWiki server host and displaying that file's content in one of the returned JIRA fields (such as the summary or description for example).

For example:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE foo [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]>
<rss version="0.92">
...
    <item>
      <title>&xxe;</title>
      <link>https://jira.xwiki.org/browse/XE-307</link>
      <project id="10222" key="XE">{RETIRED} XWiki Enterprise</project>
      <description>&xxe;</description>
      <environment/>
...

Patches

The vulnerability has been patched in the JIRA Extension v8.6.5.

Workarounds

No easy workaround except to upgrade (which is easy using the XWiki Extension Manager).

References

• https://github.com/xwiki-contrib/jira/commit/98a74c2a516b42689c73b13ecd94e9c1998fa9cb and https://github.com/xwiki-contrib/jira/commit/5049e352d16f8356734de70daf1202301f170ee6
• https://jira.xwiki.org/browse/JIRA-49

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