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RHEL 4 / 5 / 6 : postfix (RHSA-2011:0843)

medium Nessus Plugin ID 54931

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated postfix packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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.

Red Hat would like to thank the CERT/CC for reporting this issue.
Upstream acknowledges Thomas Jarosch of Intra2net AG as the original reporter.

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.

Solution

Update the affected packages.

See Also

https://access.redhat.com/security/cve/cve-2011-1720

https://access.redhat.com/errata/RHSA-2011:0843

Plugin Details

Severity: Medium

ID: 54931

File Name: redhat-RHSA-2011-0843.nasl

Version: 1.21

Type: local

Agent: unix

Published: 6/1/2011

Updated: 1/14/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.5

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:postfix, p-cpe:/a:redhat:enterprise_linux:postfix-pflogsumm, cpe:/o:redhat:enterprise_linux:5, cpe:/o:redhat:enterprise_linux:5.6, p-cpe:/a:redhat:enterprise_linux:postfix-debuginfo, cpe:/o:redhat:enterprise_linux:6.1, cpe:/o:redhat:enterprise_linux:6, cpe:/o:redhat:enterprise_linux:4, p-cpe:/a:redhat:enterprise_linux:postfix-perl-scripts, cpe:/o:redhat:enterprise_linux:4.8

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/31/2011

Vulnerability Publication Date: 5/13/2011

Reference Information

CVE: CVE-2011-1720

BID: 47778

RHSA: 2011:0843