CVE-2021-37533
MEDIUMApache Commons Net < 3.9.0 - Information Disclosure via FTP PASV Host Redirection
Title source: llmDescription
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.
References (4)
Core 4
Core References
Issue Tracking, Mailing List, Third Party Advisory mailing-list
http://www.openwall.com/lists/oss-security/2022/12/03/1
Mailing List, Third Party Advisory mailing-list
https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5307
Issue Tracking, Mailing List, Vendor Advisory
https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7
Scores
CVSS v3
6.5
EPSS
0.0025
EPSS Percentile
48.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-20
Status
published
Products (4)
apache/commons_net
< 3.9.0
commons-net/commons-net
0 - 3.9.0Maven
debian/debian_linux
10.0
debian/debian_linux
11.0
Published
Dec 03, 2022
Tracked Since
Feb 18, 2026