CVE-2022-4565 in HuTool
Summary
by MITRE • 12/16/2022
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.
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Analysis
by VulDB Data Team • 01/13/2023
The vulnerability identified as CVE-2022-4565 represents a resource consumption issue within the Dromara HuTool library, specifically affecting the cn.hutool.core.util.ZipUtil.java component. This flaw exists in versions up to and including 5.8.10, creating a significant security risk for applications that rely on the library's compression and decompression functionalities. The vulnerability is classified as problematic due to its potential to cause denial of service conditions through excessive resource utilization, making it particularly dangerous in production environments where system stability and availability are paramount.
The technical nature of this vulnerability stems from improper handling of resource management during zip file processing operations. When the ZipUtil.java component processes certain malformed or specially crafted zip archives, it fails to properly release memory resources or control the consumption of system resources such as heap memory and CPU cycles. This resource leak or excessive consumption can occur both during the initial processing of zip files and during subsequent operations on compressed data. The flaw is particularly concerning because it can be triggered through remote exploitation, meaning that attackers can potentially send malicious zip files or data to applications using HuTool, causing them to consume increasing amounts of system resources until the application becomes unresponsive or crashes.
From an operational impact perspective, this vulnerability poses a substantial threat to system availability and performance. Applications utilizing affected versions of HuTool may experience gradual performance degradation, complete system crashes, or become unresponsive to legitimate user requests. The remote exploitability of this vulnerability means that attackers can target systems without requiring local access, making it particularly dangerous for web applications and services that process user-uploaded zip files. The vulnerability's public disclosure status increases the risk of exploitation, as attackers can readily access information about the specific flaw and develop attack vectors accordingly.
The recommended remediation involves upgrading to version 5.8.11 of the Dromara HuTool library, which contains the necessary patches to address the resource consumption issue. Organizations should prioritize this upgrade across all affected systems and applications that utilize the vulnerable library. Additionally, implementing input validation and sanitization measures for zip file processing can provide additional defense-in-depth layers. Security teams should also monitor their systems for signs of resource exhaustion or unusual CPU/memory usage patterns that might indicate exploitation attempts. This vulnerability aligns with CWE-400, which covers resource exhaustion issues, and may be categorized under ATT&CK technique T1499.004 for resource exhaustion attacks. The vulnerability demonstrates how seemingly routine library functions can become attack vectors when proper resource management and input validation are not implemented. Organizations should also consider implementing network segmentation and access controls to limit the potential impact of exploitation attempts, particularly for applications that process untrusted zip file data from external sources.