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FastAsyncWorldEdit vulnerable to Uncontrolled Resource Consumption

Moderate severity GitHub Reviewed Published Jun 22, 2023 in IntellectualSites/FastAsyncWorldEdit • Updated Nov 4, 2023

Package

maven com.fastasyncworldedit:FastAsyncWorldEdit-Bukkit (Maven)

Affected versions

< 2.6.3

Patched versions

2.6.3
maven com.fastasyncworldedit:FastAsyncWorldEdit-Core (Maven)
< 2.6.3
2.6.3

Description

Coordinated Disclosure Timeline

  • 10.06.2023: Issue reported to IntellectualSites
  • 11.06.2023: Issue is acknowledged
  • 12.06.2023: Issue has been fixed
  • 22.06.2023: Advisory has been published

Impacted version range

Before 2.6.3

Details

Proof of Concept

As a user, do the following:

  1. Select position 1 via //pos1
  2. Select position 2 adding the "Infinity" keyword via //pos2 Infinity
  3. Execute any further operation.

The steps 1 and 2 are interchangeable.

Impact

Such a task has a possibility of bringing the performing server down.

CVE

Credit

This issue was discovered and reported by @SuperMonis.

Solution

On June 12, 2023, a patch, IntellectualSites/FastAsyncWorldEdit#2285, has been merged addressing the vulnerability.
We strongly recommend users to update their version of FastAsyncWorldEdit to 2.6.3 as soon as possible.

Workarounds

There is no direct mitigation besides updating FastAsyncWorldEdit to a patched version.

Additional Information

Users with access to the logs/ folder or shell access on their server can try to identify possible abuses of this issue by going through the logs.
To sieve through the data, you can use the regex query \/\/pos[12] Infinity, then investigate all log entries that return results.

Disclosure Policy

If you discover a security vulnerability within our software, please report the issue according to our vulnerability disclosure policy.

References

Published to the GitHub Advisory Database Jun 22, 2023
Reviewed Jun 22, 2023
Published by the National Vulnerability Database Jun 23, 2023
Last updated Nov 4, 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
Local
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.042%
(5th percentile)

Weaknesses

CVE ID

CVE-2023-35925

GHSA ID

GHSA-whj9-m24x-qhhp

Credits

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