CVE-2009-4565

HighCVSS 7.5/10Last modified Jun 16, 2026

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.

Metrics

CVSS 2.0 7.5/10AV:N/AC:L/Au:N/C:P/I:P/A:P

Weakness enumeration

CWE-310

Affected software

No affected versions have been published.

Timeline

Published
Jan 4, 2010
Last modified
Jun 16, 2026
NVD status
Modified

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CVE-2009-4565: High severity, CVSS 7.5 | Vulnix