CVE-2021-37533
Published: 3 December 2022
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libcommons-net-java Launchpad, Ubuntu, Debian |
jammy |
Released
(3.6-1+deb11u1build0.22.04.1)
|
| kinetic |
Released
(3.6-1+deb11u1build0.22.10.1)
|
|
| lunar |
Not vulnerable
(3.9.0-1)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Not vulnerable
|
|
| xenial |
Released
(3.4-2ubuntu2+esm1)
Available with Ubuntu Pro |
|
| bionic |
Released
(3.6-1+deb11u1build0.18.04.1)
|
|
| focal |
Released
(3.6-1+deb11u1build0.20.04.1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-37533
- https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7
- https://issues.apache.org/jira/browse/NET-711
- https://github.com/apache/commons-net/commit/b0bff89f70cfea70009e22f87639816cc3993974 (commons-net-3.9.0-RC1)
- NVD
- Launchpad
- Debian