Scientific Linux: 2011-05-31 Moderate: Postfix Buffer Over-Read

Date: Wed, 1 Jun 2011 11:41:43 -0500
Reply-To: Troy Dawson 
Sender: Security Errata for Scientific Linux
 
From: Troy Dawson 
Subject: Security ERRATA Moderate: postfix on SL4.x, SL5.x i386/x86_64
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MIME-Version: 1.0

Synopsis: Moderate: postfix security update
Issue Date: 2011-05-31
CVE Numbers: CVE-2011-1720

Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),
and TLS.

A heap-based buffer over-read flaw was found in the way Postfix
performed SASL handlers management for SMTP sessions, when Cyrus SASL
authentication was enabled. A remote attacker could use this flaw to
cause the Postfix smtpd server to crash via a specially-crafted SASL
authentication request. The smtpd process was automatically restarted by
the postfix master process after the time configured with
service_throttle_time elapsed. (CVE-2011-1720)

Note: Cyrus SASL authentication for Postfix is not enabled by default.

Users of Postfix are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue. After installing this
update, the postfix service will be restarted automatically.

SL4:
 x86_64
 postfix-2.2.10-1.5.el4.x86_64.rpm
 postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
 postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm
 i386
 postfix-2.2.10-1.5.el4.i386.rpm
 postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
 postfix-debuginfo-2.2.10-1.5.el4.i386.rpm
SL5:
 x86_64
 postfix-pflogsumm-2.3.3-2.3.el5_6.x86_64.rpm
 postfix-2.3.3-2.3.el5_6.x86_64.rpm
 postfix-debuginfo-2.3.3-2.3.el5_6.x86_64.rpm
 i386
 postfix-2.3.3-2.3.el5_6.i386.rpm
 postfix-debuginfo-2.3.3-2.3.el5_6.i386.rpm
 postfix-pflogsumm-2.3.3-2.3.el5_6.i386.rpm

- Scientific Linux Development Team