CVEvulnerability
CVE-2021-37533
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-12-03
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-20
Description
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.
Affected configurations
• apache commons net (< 3.9.0)
• debian debian linux 10.0
• debian debian linux 11.0
Related
Weakness · CWE (1)
- CWE-20 Improper Input Validation weakness
References
- http://www.openwall.com/lists/oss-security/2022/12/03/1 Issue Tracking, Mailing List, Third Party Advisory
- https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7 Issue Tracking, Mailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html Mailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5307 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2022/12/03/1 Issue Tracking, Mailing List, Third Party Advisory
- https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7 Issue Tracking, Mailing List, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html Mailing List, Third Party Advisory
- https://www.debian.org/security/2022/dsa-5307 Third Party Advisory