Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3251-1 libcommons-net-java security update
Debian DSA Debian DSA DSA-5307-1 libcommons-net-java security update
EUVD EUVD EUVD-2022-7599 Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See https://issues.apache.org/jira/browse/NET-711.
Github GHSA Github GHSA GHSA-cgp8-4m63-fhh5 Apache Commons Net vulnerable to information leakage via malicious server
Ubuntu USN Ubuntu USN USN-6037-1 Apache Commons Net vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 14 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00197}

epss

{'score': 0.00162}


Thu, 24 Apr 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2025-04-24T15:25:18.237Z

Reserved: 2021-07-26T00:00:00.000Z

Link: CVE-2021-37533

cve-icon Vulnrichment

Updated: 2024-08-04T01:23:01.166Z

cve-icon NVD

Status : Modified

Published: 2022-12-03T15:15:09.747

Modified: 2025-04-24T16:15:18.227

Link: CVE-2021-37533

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-02-15T00:00:00Z

Links: CVE-2021-37533 - Bugzilla

cve-icon OpenCVE Enrichment

No data.