CVE-2009-4565

EPSS 0.77%

sendmail - insufficient input validation

Published: 1/4/2010Modified: 4/28/2026
Also known as:DEBIAN-CVE-2009-4565

Description

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 packages (2)

References (1)