Scientific Linux Security Update : sendmail on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing one or more security
updates.

Description :

The configuration of sendmail in Scientific Linux was found to not
reject the 'localhost.localdomain' domain name for email messages that
come from external hosts. This could allow remote attackers to
disguise spoofed messages. (CVE-2006-7176)

A flaw was found in the way sendmail handled NUL characters in the
CommonName field of X.509 certificates. An attacker able to get a
carefully-crafted certificate signed by a trusted Certificate
Authority could trick sendmail into accepting it by mistake, allowing
the attacker to perform a man-in-the-middle attack or bypass intended
client certificate authentication. (CVE-2009-4565)

Note: The CVE-2009-4565 issue only affected configurations using TLS
with certificate verification and CommonName checking enabled, which
is not a typical configuration.

This update also fixes the following bugs :

- sendmail was unable to parse files specified by the
ServiceSwitchFile option which used a colon as a
separator. (BZ#512871)

- sendmail incorrectly returned a zero exit code when free
space was low. (BZ#299951)

- the sendmail manual page had a blank space between the
-qG option and parameter. (BZ#250552)

- the comments in the sendmail.mc file specified the wrong
path to SSL certificates. (BZ#244012)

- the sendmail packages did not provide the MTA
capability. (BZ#494408)

See also :

http://www.nessus.org/u?5569d4dd
https://bugzilla.redhat.com/show_bug.cgi?id=244012
https://bugzilla.redhat.com/show_bug.cgi?id=250552
https://bugzilla.redhat.com/show_bug.cgi?id=299951
https://bugzilla.redhat.com/show_bug.cgi?id=494408
https://bugzilla.redhat.com/show_bug.cgi?id=512871

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60774 ()

Bugtraq ID:

CVE ID: CVE-2006-7176
CVE-2009-4565