CVE-2021-37533 Apache Commons Net's FTP client trusts the host from PASV response by default

2022-12-0300:00:00

CWE-20

apache

www.cve.org

apache commons net

ftp client

pasv response

6.8 Medium

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

65.4%

JSON

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.

CNA Affected

[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache Commons Net",
    "versions": [
      {
        "version": "Apache Commons Net",
        "status": "affected",
        "lessThan": "3.9.0",
        "versionType": "custom"
      }
    ]
  }
]