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: 1/7/2010

Updated: 3/6/2019

Nessus ID: 43637

Risk Information


Risk Factor: Medium

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


Risk Factor: Medium

Base Score: 6.5

Temporal Score: 6.2

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:2.3:a:sendmail:sendmail:*:*:*:*:*:*:*:*

Patch Publication Date: 12/30/2009

Vulnerability Publication Date: 12/30/2009

Reference Information

CVE: CVE-2009-4565

BID: 37543

IAVA: 2010-A-0002