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Red Hat: RHSA-2011:0843-01 Moderate: Postfix SASL Crash

red hat
Calendar Grey May 31, 2011
Scroller Redhat
The recent security patch for Postfix on Red Hat delivers a noteworthy enhancement to the efficiency of the mail transfer system, addressing moderate vulnerabilities.
Updated postfix packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

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.

Topics%20covered

Topics Covered

security advisory moderate buffer overflow red hat postfix sasl mail transport agent

References

https://access.redhat.com/security/cve/CVE-2011-1720 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: postfix-2.2.10-1.5.el4.i386.rpm postfix-debuginfo-2.2.10-1.5.el4.i386.rpm postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
ia64: postfix-2.2.10-1.5.el4.ia64.rpm postfix-debuginfo-2.2.10-1.5.el4.ia64.rpm postfix-pflogsumm-2.2.10-1.5.el4.ia64.rpm
ppc: postfix-2.2.10-1.5.el4.ppc.rpm postfix-debuginfo-2.2.10-1.5.el4.ppc.rpm postfix-pflogsumm-2.2.10-1.5.el4.ppc.rpm
s390: postfix-2.2.10-1.5.el4.s390.rpm postfix-debuginfo-2.2.10-1.5.el4.s390.rpm postfix-pflogsumm-2.2.10-1.5.el4.s390.rpm
s390x: postfix-2.2.10-1.5.el4.s390x.rpm postfix-debuginfo-2.2.10-1.5.el4.s390x.rpm postfix-pflogsumm-2.2.10-1.5.el4.s390x.rpm
x86_64: postfix-2.2.10-1.5.el4.x86_64.rpm postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: postfix-2.2.10-1.5.el4.i386.rpm postfix-debuginfo-2.2.10-1.5.el4.i386.rpm postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
x86_64: postfix-2.2.10-1.5.el4.x86_64.rpm postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386: postfix-2.2.10-1.5.el4.i386.rpm postfix-debuginfo-2.2.10-1.5.el4.i386.rpm postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
ia64:

Read the Full Advisory


Advisory ID: RHSA-2011:0843-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0843.html
Issue date: 2011-05-31

Topic

Updated postfix packages that fix one security issue are now available forRed Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate buffer overflow red hat postfix sasl mail transport agent

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

699035 - CVE-2011-1720 postfix (smtpd): Crash due to improper management of SASL handlers for SMTP sessions

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