CVE-2009-3639 — proftpd-dfsg - SSL certificate verification weakness

描述

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.

如何修補 CVE-2009-3639

要修補 CVE-2009-3639,請將受影響套件升級到下列已修補版本。

Debian/proftpd-dfsg—升級至 1.3.2a-2 或更新版本
—升級至 1.3.0-19etch3 或更新版本

CVE-2009-3639 正在被利用嗎?

中等 — EPSS 為 5.7%,可持續追蹤但非最高優先。

受影響套件(2)

from 0, < 1.3.2a-2
from 0, < 1.3.0-19etch3

參考連結(1)

ADVISORYsecurity-tracker.debian.org/tracker/CVE-2009-3639