CVE catalog
CVE-2021-37533
libcommons-net-java: CVE-2021-37533
- Severity
- Medium · CVSS 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.13% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | libcommons-net-java | sid | 3.13.0-1 | fixed |
| Debian | libcommons-net-java | forky | 3.9.0-1 | fixed |
| Debian | libcommons-net-java | trixie | 3.9.0-1 | fixed |
| Debian | libcommons-net-java | bookworm | 3.9.0-1 | fixed |
| Ubuntu | libcommons-net-java | pro | 3.3-2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-1 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2ubuntu2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2ubuntu2+esm1 | fixed |
| Ubuntu | libcommons-net-java | 18.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 18.04 | 3.6-1+deb11u1build0.18.04.1 | fixed |
| Ubuntu | libcommons-net-java | 20.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 20.04 | 3.6-1+deb11u1build0.20.04.1 | fixed |
| Ubuntu | libcommons-net-java | 22.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 22.04 | 3.6-1+deb11u1build0.22.04.1 | fixed |
| Opensuse | apache-commons-net | tumbleweed | 3.9.0-1.1 | fixed |
| Ubuntu | libcommons-net-java | pro | 3.3-2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-1 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2ubuntu2 | vulnerable |
| Ubuntu | libcommons-net-java | pro | 3.4-2ubuntu2+esm1 | fixed |
| Ubuntu | libcommons-net-java | 18.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 18.04 | 3.6-1+deb11u1build0.18.04.1 | fixed |
| Ubuntu | libcommons-net-java | 20.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 20.04 | 3.6-1+deb11u1build0.20.04.1 | fixed |
| Ubuntu | libcommons-net-java | 22.04 | 3.6-1 | vulnerable |
| Ubuntu | libcommons-net-java | 22.04 | 3.6-1+deb11u1build0.22.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | libcommons-net-java | source | sid | 3.9.0-1 | not yet assigned | Not reported | [1025910] |
| Debian | libcommons-net-java | source | forky | 3.9.0-1 | not yet assigned | Not reported | [1025910] |
| Debian | libcommons-net-java | source | trixie | 3.9.0-1 | not yet assigned | Not reported | [1025910] |
| Debian | libcommons-net-java | source | bookworm | 3.9.0-1 | not yet assigned | Not reported | [1025910] |
| Ubuntu | libcommons-net-java | deb | pro | 3.4-2ubuntu2+esm1 | Not reported | USN-6037-1 | Not reported |
| Ubuntu | libcommons-net-java | deb | 18.04 | 3.6-1+deb11u1build0.18.04.1 | Not reported | USN-6037-1 | Not reported |
| Ubuntu | libcommons-net-java | deb | 20.04 | 3.6-1+deb11u1build0.20.04.1 | Not reported | USN-6037-1 | Not reported |
| Ubuntu | libcommons-net-java | deb | 22.04 | 3.6-1+deb11u1build0.22.04.1 | Not reported | USN-6037-1 | Not reported |
| Opensuse | apache-commons-net | rpm | tumbleweed | 3.9.0-1.1 | Not reported | OPENSUSE-SU-2024:12549-1 | Not reported |
| Ubuntu | libcommons-net-java | deb | pro | 3.4-2ubuntu2+esm1 | Not reported | UBUNTU-CVE-2021-37533 | Not reported |
| Ubuntu | libcommons-net-java | deb | 18.04 | 3.6-1+deb11u1build0.18.04.1 | Not reported | UBUNTU-CVE-2021-37533 | Not reported |
| Ubuntu | libcommons-net-java | deb | 20.04 | 3.6-1+deb11u1build0.20.04.1 | Not reported | UBUNTU-CVE-2021-37533 | Not reported |
| Ubuntu | libcommons-net-java | deb | 22.04 | 3.6-1+deb11u1build0.22.04.1 | Not reported | UBUNTU-CVE-2021-37533 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [apache-commons-net-examples]Unknown
Source package: [apache-commons-net]
Details (1)
3.13.0-1.3· noarch · tumbleweedUnknown · Fixed:
3.9.0-1.1Version impact unknown
dsa · apache-commons-net · opensuse · tumbleweed
- [apache-commons-net-ftp]Unknown
Source package: [apache-commons-net]
Details (1)
3.13.0-1.3· noarch · tumbleweedUnknown · Fixed:
3.9.0-1.1Version impact unknown
dsa · apache-commons-net · opensuse · tumbleweed
- [apache-commons-net-javadoc]Unknown
Source package: [apache-commons-net]
Details (1)
3.13.0-1.3· noarch · tumbleweedUnknown · Fixed:
3.9.0-1.1Version impact unknown
dsa · apache-commons-net · opensuse · tumbleweed
- [apache-commons-net]Fixed
Source package: [apache-commons-net]
Details (1)
3.13.0-1.3· noarch · tumbleweedFixed · Fixed:
3.9.0-1.1dsa · apache-commons-net · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [libcommons-net-java]Fixed
Details (2)
3.9.0-1· all · bookwormFixed · Fixed:
3.9.0-1dsa · libcommons-net-java · debian · bookworm; dsa · libcommons-net-java · debian · 12
3.9.0-1· all · bookwormFixed · Fixed:
3.9.0-1dsa · libcommons-net-java · debian · bookworm; dsa · libcommons-net-java · debian · 12
[Debian 13 (Trixie)]
- [libcommons-net-java]Fixed
Details (2)
3.9.0-1· all · trixieFixed · Fixed:
3.9.0-1dsa · libcommons-net-java · debian · 13
3.9.0-1· all · trixieFixed · Fixed:
3.9.0-1dsa · libcommons-net-java · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2024_12549-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-37533]
- [https://osv.dev/vulnerability/DLA-3251-1]
- [https://osv.dev/vulnerability/DSA-5307-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-37533]
- [https://osv.dev/vulnerability/USN-6037-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:12549-1]
- [https://security-tracker.debian.org/tracker/CVE-2021-37533]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-37533.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2024/wid-sec-w-2024-0123.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]