CVE-2023-49280: Data leak of password hash through xwiki change request
Impact
Change request allows to edit any page by default, and the changes are then exported in an XML that anyone can download. So it's possible for an attacker to obtain password hash of users by performing edition of the user profiles and then downloading the XML that has been created. This is also true for any document that might contain password field and that a user can view. This vulnerability impacts all version of Change Request, but the impact depends on the rights that has been set on the wiki since it requires for the user to have the Change request right (allowed by default) and view rights on the page to target. Also the issue cannot be easily exploited in an automated way.
Patches
The patch consists in denying to users the right of editing pages that contains a password field with change request. It means that already existing change request for those pages won't be removed by the patch, administrators needs to take care of it.
The patch is provided in Change Request 1.10, administrators should upgrade immediately.
Workarounds
It's possible to workaround the vulnerability by denying manually the Change request right on some spaces, such as XWiki space which will include any user profile by default.
References
JIRA issue: https://jira.xwiki.org/browse/CRAPP-302 Commit of the fix: https://github.com/xwiki-contrib/application-changerequest/commit/ff0f5368ea04f0e4aa7b33821c707dc68a8c5ca8
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
Thanks Michael Hamann for the report.
Other sources
XWiki Change Request is an XWiki application allowing to request changes on a wiki without publishing directly the changes. Change request allows to edit any page by default, and the changes are then exported in an XML file that anyone can download. So it's possible for an attacker to obtain password hash of users by performing an edit on the user profiles and then downloading the XML file that has been created. This is also true for any document that might contain password field and that a user can view. This vulnerability impacts all version of Change Request, but the impact depends on the rights that has been set on the wiki since it requires for the user to have the Change request right (allowed by default) and view rights on the page to target. This issue cannot be easily exploited in an automated way. The patch consists in denying to users the right of editing pages that contains a password field with change request. It means that already existing change request for those pages won't be removed by the patch, administrators needs to take care of it. The patch is provided in Change Request 1.10, administrators should upgrade immediately. It's possible to workaround the vulnerability by denying manually the Change request right on some spaces, such as XWiki space which will include any user profile by default.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2023-49280.
What is the title of the vulnerability?
The title of the vulnerability is 'Data leak of password hash through xwiki change request'.
What is the impact of this vulnerability?
The impact of this vulnerability is that an attacker can obtain password hash of users by editing user profiles and downloading the XML export of the changes.
Which software is affected by this vulnerability?
The software affected by this vulnerability is 'org.xwiki.contrib.changerequest:application-changerequest-default' (version 0.1 to 1.10).
What is the severity of CVE-2023-49280?
The severity of CVE-2023-49280 is high (7.7).
How can I fix this vulnerability?
To fix this vulnerability, apply the remedy version 1.10 of 'org.xwiki.contrib.changerequest:application-changerequest-default'.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability at the following references: - [GitHub Advisory](https://github.com/xwiki-contrib/application-changerequest/security/advisories/GHSA-2fr7-cc7p-p45q) - [GitHub Commit](https://github.com/xwiki-contrib/application-changerequest/commit/ff0f5368ea04f0e4aa7b33821c707dc68a8c5ca8) - [XWiki JIRA](https://jira.xwiki.org/browse/CRAPP-302)