CVE-2021-37533

Summary

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 Software

Weaknesses

• CWE-20: CWE-20 Improper Input Validation

ADP Enrichment

CVE Program Container

Additional References

• https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7
• http://www.openwall.com/lists/oss-security/2022/12/03/1
• https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html
• https://www.debian.org/security/2022/dsa-5307

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://lists.apache.org/thread/o6yn9r9x6s94v97264hmgol1sf48mvx7
• http://www.openwall.com/lists/oss-security/2022/12/03/1
• https://lists.debian.org/debian-lts-announce/2022/12/msg00038.html
• https://www.debian.org/security/2022/dsa-5307

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