CVE-2021-37533
Apache Commons Net's FTP client trusts the host from PASV response by default
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
Antes de Apache Commons Net 3.9.0, el cliente FTP de Net confía en el host desde la respuesta PASV de forma predeterminada. Un servidor malicioso puede redirigir el código de Commons Net para utilizar un host diferente, pero el usuario debe conectarse al servidor malicioso en primer lugar. Esto puede provocar una fuga de información sobre los servicios que se ejecutan en la red privada del cliente. El valor predeterminado en la versión 3.9.0 ahora es falso para ignorar dichos hosts, como lo hace cURL. Consulte https://issues.apache.org/jira/browse/NET-711.
A flaw was found in Apache Commons Net's FTP, where the client trusts the host from PASV response by default. A malicious server could 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 issue could lead to leakage of information about services running on the private network of the client.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-07-26 CVE Reserved
- 2022-12-03 CVE Published
- 2024-06-25 EPSS Updated
- 2024-08-04 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-20: Improper Input Validation
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| http://www.openwall.com/lists/oss-security/2022/12/03/1 | Issue Tracking |
|
| https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html | Mailing List |
|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7 | 2023-01-10 | |
| https://www.debian.org/security/2022/dsa-5307 | 2023-01-10 | |
| https://access.redhat.com/security/cve/CVE-2021-37533 | 2023-06-19 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2169924 | 2023-06-19 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Apache Search vendor "Apache" | Commons Net Search vendor "Apache" for product "Commons Net" | < 3.9.0 Search vendor "Apache" for product "Commons Net" and version " < 3.9.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 10.0 Search vendor "Debian" for product "Debian Linux" and version "10.0" | - |
Affected
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 11.0 Search vendor "Debian" for product "Debian Linux" and version "11.0" | - |
Affected
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