CVE-2009-4565: High severity sendmail vulnerability
sendmail before 8.14.4 does not properly handle a '\0' character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2009-4565?
CVE-2009-4565 is classified as a high-severity vulnerability due to its potential for exploitation via man-in-the-middle attacks.
How do I fix CVE-2009-4565?
To address CVE-2009-4565, upgrade to Sendmail version 8.14.4 or later to ensure proper handling of the Common Name in X.509 certificates.
What systems are affected by CVE-2009-4565?
CVE-2009-4565 affects multiple Sendmail versions prior to 8.14.4, including 8.9.2, 8.11.4, and others.
What types of attacks can exploit CVE-2009-4565?
CVE-2009-4565 can be exploited in man-in-the-middle attacks where an attacker can spoof SSL-based SMTP servers.
What are the implications of CVE-2009-4565 for SSL/TLS use?
CVE-2009-4565 raises serious concerns regarding the integrity of SSL/TLS connections in applications using the vulnerable Sendmail versions.