Medium, CVSS 6.5MavenPublished
Apache Commons Net vulnerable to information leakage via malicious server
CVE-2021-37533 · GHSA-cgp8-4m63-fhh5
- Affected
- Maven commons-net:commons-net < 3.9.0
- Fixed in
- 3.9.0· Vendor fix available
- Issue
- 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.
Recommended action: Upgrade to 3.9.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.