Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS04eGhyLXgzdjgtcmdoas4AA1eR

XWiki Platform's Groovy jobs check the wrong author, allowing remote code execution

Impact

XWiki supports scheduled jobs that contain Groovy scripts. Currently, the job checks the content author of the job for programming right. However, modifying or adding a job script to a document doesn't modify the content author. Together with a CSRF vulnerability in the job scheduler, this can be exploited for remote code execution by an attacker with edit right on the wiki.

For successful exploitation, the needs to have edit right on a document whose content has last been changed by a user with programming right. This could be the user profile for users created by admins. In this document, the attacker can create an object of class XWiki.SchedulerJobClass using the object editor. By setting job class to com.xpn.xwiki.plugin.scheduler.GroovyJob, cron expression to 0 0/5 * * * ? and job script to services.logging.getLogger("foo").error("Job content executed"), the attacker can create a job. Now this job just needs to be triggered or scheduled. This can be achieved by embedding an image with the following XWiki syntax in any document that is visited by an admin: [[image:path:/xwiki/bin/view/Scheduler/?do=trigger&which=Attacker.Document]] where Attacker.Document is the document that has been prepared by the attacker. If the attack is successful, an error log entry with "Job content executed" will be produced.

Patches

This vulnerability has been patched in XWiki 14.10.9 and 15.4RC1.

Workarounds

There is no workaround.

References

• https://jira.xwiki.org/browse/XWIKI-20852
• https://github.com/xwiki/xwiki-platform/commit/fcdcfed3fe2e8a3cad66ae0610795a2d58ab9662

Permalink: https://github.com/advisories/GHSA-8xhr-x3v8-rghj
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS04eGhyLXgzdjgtcmdoas4AA1eR
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: 8 months ago
Updated: 6 months ago

CVSS Score: 9.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Identifiers: GHSA-8xhr-x3v8-rghj, CVE-2023-40573
References:

• https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-8xhr-x3v8-rghj
• https://github.com/xwiki/xwiki-platform/commit/fcdcfed3fe2e8a3cad66ae0610795a2d58ab9662
• https://jira.xwiki.org/browse/XWIKI-20852
• https://nvd.nist.gov/vuln/detail/CVE-2023-40573
• https://github.com/advisories/GHSA-8xhr-x3v8-rghj

Repository: https://github.com/xwiki/xwiki-platform
Blast Radius: 1.0

Affected Packages