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Cryptographic Issues

CVE-2009-3639

Medium
5.8/10

Summary

The mod_tls module in ProFTPD before 1.3.2b, and 1.3.3 before 1.3.3rc2, when the dNSNameRequired TLS option is enabled, does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 client certificate, which allows remote attackers to bypass intended client-hostname restrictions via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

  • MEDIUM
  • NETWORK
  • NONE
  • PARTIAL
  • NONE
  • PARTIAL

CWE-310 - Cryptographic Issues

Cryptographic issues is a category of weaknesses related to the design and implementation of the confidentiality and integrity of data. If not addressed, the weaknesses in this category can lead to data quality degradation.

References

Advisory Timeline

  • Published