CVE-2009-4565
sendmail - insufficient input validation
EPSS 0.77%
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.
How to fix CVE-2009-4565
To remediate CVE-2009-4565, upgrade the affected package to a fixed version below.
- —upgrade to 8.14.3-9.1 or later
- —upgrade to 8.13.8-3+etch1 or later
Is CVE-2009-4565 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 8.14.3-9.1
- from 0, < 8.13.8-3+etch1