Sendmail < 8.14.4 SSL Certificate NULL Character Spoofing

Medium Nessus Network Monitor Plugin ID 5293


The remote host is vulnerable to a man-in-the-middle attack.


The remote mail server is running a version of Sendmail earlier than 8.14.4. Such versions are potentially affected by a flaw that my allow an attacker to spoof SSL certificates by using a NULL character in certain certificate fields.


Upgrade to Sendmail 8.14.4 or later.

See Also

Plugin Details

Severity: Medium

ID: 5293

Family: SMTP Servers

Published: 2010/01/07

Updated: 2019/03/06

Dependencies: 2004, 2005

Nessus ID: 43637

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 6.4

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3.0

Base Score: 6.5

Temporal Score: 6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:sendmail:sendmail

Patch Publication Date: 2009/12/30

Vulnerability Publication Date: 2009/12/30

Reference Information

CVE: CVE-2009-4565

BID: 37543

IAVA: 2010-A-0002