PT-2009-5911 · Proftpd · Proftpd
Jan Lieskovsky
·
Publicado
2009-10-28
·
Atualizado
2024-06-15
·
CVE-2009-3639
CVSS v2.0
5.8
Média
| Vetor | AV:N/AC:M/Au:N/C:N/I:P/A:P |
Name of the Vulnerable Software and Affected Versions
ProFTPD versions prior to 1.3.2b
ProFTPD version 1.3.3 before 1.3.3rc2
Description
The issue arises from improper handling of a '0' character in a domain name within the Subject Alternative Name field of an X.509 client certificate when the dNSNameRequired TLS option is enabled. This allows remote attackers to bypass intended client-hostname restrictions by using a crafted certificate issued by a legitimate Certification Authority.
Recommendations
For ProFTPD versions prior to 1.3.2b, update to version 1.3.2b or later.
For ProFTPD version 1.3.3 before 1.3.3rc2, update to version 1.3.3rc2 or later.
Correção
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Enumeração de Fraquezas
Identificadores relacionados
Produtos afetados
Proftpd