[Systems] [Fwd: [SECURITY] [DSA 2233-1] postfix security update]

[Bernie Innocenti]

We need to ensure that we're running the latest postfix on all our
machines!

Additionally, machines that do not need to receive email shouldn't have
an smtpd listening on port 25.

-------- Forwarded Message --------
From: Florian Weimer <fw at deneb.enyo.de>
Reply-to: debian-security at lists.debian.org
To: debian-security-announce at lists.debian.org
Subject: [SECURITY] [DSA 2233-1] postfix security update
Date: Tue, 10 May 2011 19:57:47 +0200

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-2233-1                   security at debian.org
http://www.debian.org/security/                            Florian Weimer
May 10, 2011                           http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : postfix
Vulnerability  : several
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2009-2939 CVE-2011-0411 CVE-2011-1720

Several vulnerabilities were discovered in Postfix, a mail transfer
agent.  The Common Vulnerabilities and Exposures project identifies
the following problems:

CVE-2009-2939
        The postinst script grants the postfix user write access to
        /var/spool/postfix/pid, which might allow local users to
        conduct symlink attacks that overwrite arbitrary files.

CVE-2011-0411
        The STARTTLS implementation does not properly restrict I/O
        buffering, which allows man-in-the-middle attackers to insert
        commands into encrypted SMTP sessions by sending a cleartext
        command that is processed after TLS is in place.

CVE-2011-1720
        A heap-based read-only buffer overflow allows malicious
        clients to crash the smtpd server process using a crafted SASL
        authentication request.

For the oldstable distribution (lenny), this problem has been fixed in
version 2.5.5-1.1+lenny1.

For the stable distribution (squeeze), this problem has been fixed in
version 2.7.1-1+squeeze1.

For the unstable distribution (sid), this problem has been fixed in
version 2.8.0-1.

We recommend that you upgrade your postfix packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce at lists.debian.org
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-- 
 _ // Bernie Innocenti
 \X/  http://codewiz.org