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Public Date:
552622: CVE-2009-4565 sendmail: incorrect verification of SSL certificate with NUL in name

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2009-4565 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 4
Base Metrics AV:N/AC:H/Au:N/C:P/I:P/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 5 (sendmail) RHSA-2010:0237 2010-03-29
Red Hat Enterprise Linux 4 (sendmail) RHSA-2011:0262 2011-02-16
Last Modified

CVE description copyright © 2017, The MITRE Corporation