CyberSecBulletin
CVE-2022-4565NVD status: Modified

HuTool: Improper Resource Shutdown or Release

Published Updated By the CyberSecBulletin desk

CVE-2022-4565 is a high-severity improper resource shutdown or release vulnerability in HuTool from Dromara, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected HuTool versions: 5.8.0; 5.8.1; 5.8.2, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.96% chance of exploitation within 30 days, higher than 62% of scored CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of HuTool you run against the affected versions below, and install the vendor's latest release.
  2. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
DromaraHuTool5.8.0; 5.8.1; 5.8.2; 5.8.3; 5.8.4; 5.8.5; 5.8.6; 5.8.7; and 3 more rangesNot stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
NoneNo data is disclosed.
Integrity
NoneNothing can be modified.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.14.3MediumCNA (vuldb.com)
CVSS 3.17.5HighNVD

Official description

A vulnerability classified as problematic was found in Dromara HuTool up to 5.8.10. This vulnerability affects unknown code of the file cn.hutool.core.util.ZipUtil.java. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 5.8.11 is able to address this issue. It is recommended to upgrade the affected component. VDB-215974 is the identifier assigned to this vulnerability.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Resource Shutdown or Release

The product does not release or incorrectly releases a resource before it is made available for re-use.

How developers prevent this class of flaw

  • Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, languages such as Java, Ruby, and Lisp perform automatic garbage collection that releases memory for objects that have been deallocated.
  • It is good practice to be responsible for freeing all resources you allocate and to be consistent with how and where you free memory in a function. If you allocate memory that you intend to free upon completion of the function, you must be sure to free the memory at all exit points for that function including error conditions.
  • Memory should be allocated/freed using matching functions such as malloc/free, new/delete, and new[]/delete[].

More Improper Resource Shutdown or Release vulnerabilities (CWE-404)

Timeline

  1. CVE record published.
  2. Record last changed materially (score, affected products, status or references).

References

Third-party and government advisories

Technical write-ups (may include proof of concept)

Other vulnerabilities in HuTool

All HuTool vulnerabilities

Recent Improper Resource Shutdown or Release vulnerabilities

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