Red Hat: 2011:0422-01: postfix: Moderate Advisory
Summary
Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),
and TLS.
It was discovered that Postfix did not flush the received SMTP commands
buffer after switching to TLS encryption for an SMTP session. A
man-in-the-middle attacker could use this flaw to inject SMTP commands into
a victim's session during the plain text phase. This would lead to those
commands being processed by Postfix after TLS encryption is enabled,
possibly allowing the attacker to steal the victim's mail or authentication
credentials. (CVE-2011-0411)
It was discovered that Postfix did not properly check the permissions of
users' mailbox files. A local attacker able to create files in the mail
spool directory could use this flaw to create mailbox files for other local
users, and be able to read mail delivered to those users. (CVE-2008-2937)
Red Hat would like to thank the CERT/CC for reporting CVE-2011-0411, and
Sebastian Krahmer of the SuSE Security Team for reporting CVE-2008-2937.
The CERT/CC acknowledges Wietse Venema as the original reporter of
CVE-2011-0411.
Users of Postfix are advised to upgrade to these updated packages, which
contain backported patches to resolve these issues. After installing this
update, the postfix service will be restarted automatically.
Summary
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
References
https://www.redhat.com/security/data/cve/CVE-2008-2937.html https://www.redhat.com/security/data/cve/CVE-2011-0411.html https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux AS version 4:
Source:
i386:
postfix-2.2.10-1.4.el4.i386.rpm
postfix-debuginfo-2.2.10-1.4.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.4.el4.i386.rpm
ia64:
postfix-2.2.10-1.4.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.4.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.ia64.rpm
ppc:
postfix-2.2.10-1.4.el4.ppc.rpm
postfix-debuginfo-2.2.10-1.4.el4.ppc.rpm
postfix-pflogsumm-2.2.10-1.4.el4.ppc.rpm
s390:
postfix-2.2.10-1.4.el4.s390.rpm
postfix-debuginfo-2.2.10-1.4.el4.s390.rpm
postfix-pflogsumm-2.2.10-1.4.el4.s390.rpm
s390x:
postfix-2.2.10-1.4.el4.s390x.rpm
postfix-debuginfo-2.2.10-1.4.el4.s390x.rpm
postfix-pflogsumm-2.2.10-1.4.el4.s390x.rpm
x86_64:
postfix-2.2.10-1.4.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.4.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386:
postfix-2.2.10-1.4.el4.i386.rpm
postfix-debuginfo-2.2.10-1.4.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.4.el4.i386.rpm
x86_64:
postfix-2.2.10-1.4.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.4.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386:
postfix-2.2.10-1.4.el4.i386.rpm
postfix-debuginfo-2.2.10-1.4.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.4.el4.i386.rpm
ia64:
postfix-2.2.10-1.4.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.4.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.ia64.rpm
x86_64:
postfix-2.2.10-1.4.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.4.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source:
i386:
postfix-2.2.10-1.4.el4.i386.rpm
postfix-debuginfo-2.2.10-1.4.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.4.el4.i386.rpm
ia64:
postfix-2.2.10-1.4.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.4.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.ia64.rpm
x86_64:
postfix-2.2.10-1.4.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.4.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.4.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386:
postfix-2.3.3-2.2.el5_6.i386.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.i386.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.i386.rpm
x86_64:
postfix-2.3.3-2.2.el5_6.x86_64.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.x86_64.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386:
postfix-2.3.3-2.2.el5_6.i386.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.i386.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.i386.rpm
ia64:
postfix-2.3.3-2.2.el5_6.ia64.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.ia64.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.ia64.rpm
ppc:
postfix-2.3.3-2.2.el5_6.ppc.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.ppc.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.ppc.rpm
s390x:
postfix-2.3.3-2.2.el5_6.s390x.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.s390x.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.s390x.rpm
x86_64:
postfix-2.3.3-2.2.el5_6.x86_64.rpm
postfix-debuginfo-2.3.3-2.2.el5_6.x86_64.rpm
postfix-pflogsumm-2.3.3-2.2.el5_6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
Topic
Updated postfix packages that fix two security issues are now available forRed Hat Enterprise Linux 4 and 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System (CVSS) base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section.
Topic
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 version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
Bugs Fixed
456347 - CVE-2008-2937 postfix improper mailbox permissions
674814 - CVE-2011-0411 postfix: SMTP commands injection during plaintext to TLS session switch
