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org.xwiki.platform:xwiki-platform-oldcore may leak data through deleted and re-created documents

Moderate severity GitHub Reviewed Published Oct 25, 2023 in xwiki/xwiki-platform • Updated Nov 10, 2023

Package

maven org.xwiki.platform:xwiki-platform-oldcore (Maven)

Affected versions

>= 9.4-rc-1, < 14.10.8
>= 15.0-rc-1, < 15.3-rc-1

Patched versions

14.10.8
15.3-rc-1

Description

Impact

When a document has been deleted and re-created, it is possible for users with view right on the re-created document but not on the deleted document to view the contents of the deleted document. Such a situation might arise when rights were added to the deleted document. This can be exploited through the diff feature and, partially, through the REST API by using versions such as deleted:1 (where the number counts the deletions in the wiki and is thus guessable). Given sufficient rights, the attacker can also re-create the deleted document, thus extending the scope to any deleted document as long as the attacker has edit right in the location of the deleted document.

Patches

This vulnerability has been patched in XWiki 14.10.8 and 15.3 RC1 by properly checking rights when deleted revisions of a document are accessed.

Workarounds

The only workaround is to regularly clean deleted documents to minimize the potential exposure. Extra care should be taken when deleting sensitive documents that are protected individually (and not, e.g., by being placed in a protected space) or deleting a protected space as a whole.

References

References

@michitux michitux published to xwiki/xwiki-platform Oct 25, 2023
Published by the National Vulnerability Database Oct 25, 2023
Published to the GitHub Advisory Database Oct 25, 2023
Reviewed Oct 25, 2023
Last updated Nov 10, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.092%
(41st percentile)

Weaknesses

CVE ID

CVE-2023-37911

GHSA ID

GHSA-gh64-qxh5-4m33

Source code

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