Scientific Linux Security Update : postfix on SL4.x, SL5.x i386/x86_64

Medium Nessus Plugin ID 61060


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


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.


Update the affected postfix, postfix-debuginfo and / or postfix-pflogsumm packages.

See Also

Plugin Details

Severity: Medium

ID: 61060

File Name: sl_20110531_postfix_on_SL4_x.nasl

Version: $Revision: 1.2 $

Type: local

Agent: unix

Published: 2012/08/01

Modified: 2014/08/16

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 2011/05/31

Reference Information

CVE: CVE-2011-1720