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