[RHSA-2015:1153-01] Moderate: mailman security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: mailman security and bug fix update

Advisory ID: RHSA-2015:1153-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1153.html

Issue date: 2015-06-23

CVE Names: CVE-2015-2775

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1. Summary:

 

Updated mailman packages that fix one security issue and several bugs are

now available for Red Hat Enterprise Linux 7.

 

Red Hat Product Security 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.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

 

3. Description:

 

Mailman is a program used to help manage email discussion lists.

 

It was found that mailman did not sanitize the list name before passing it

to certain MTAs. A local attacker could use this flaw to execute arbitrary

code as the user running mailman. (CVE-2015-2775)

 

This update also fixes the following bugs:

 

* Previously, it was impossible to configure Mailman in a way that

Domain-based Message Authentication, Reporting & Conformance (DMARC) would

recognize Sender alignment for Domain Key Identified Mail (DKIM)

signatures. Consequently, Mailman list subscribers that belonged to a mail

server with a "reject" policy for DMARC, such as yahoo.com or AOL.com, were

unable to receive Mailman forwarded messages from senders residing in any

domain that provided DKIM signatures. With this update, domains with a

"reject" DMARC policy are recognized correctly, and Mailman list

administrators are able to configure the way these messages are handled. As

a result, after a proper configuration, subscribers now correctly receive

Mailman forwarded messages in this scenario. (BZ#1229288)

 

* Previously, the /etc/mailman file had incorrectly set permissions, which

in some cases caused removing Mailman lists to fail with a "'NoneType'

object has no attribute 'close'" message. With this update, the permissions

value for /etc/mailman is correctly set to 2775 instead of 0755, and

removing Mailman lists now works as expected. (BZ#1229307)

 

* Prior to this update, the mailman utility incorrectly installed the

tmpfiles configuration in the /etc/tmpfiles.d/ directory. As a consequence,

changes made to mailman tmpfiles configuration were overwritten if the

mailman packages were reinstalled or updated. The mailman utility now

installs the tmpfiles configuration in the /usr/lib/tmpfiles.d/ directory,

and changes made to them by the user are preserved on reinstall or update.

(BZ#1229306)

 

All mailman users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues.

 

4. Solution:

 

Before applying this update, make sure all previously released errata

relevant to your system have been applied.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1208059 - CVE-2015-2775 mailman: directory traversal in MTA transports that deliver programmatically

1229288 - Yahoo.com and AOL DMARC reject policies cripples Mailman-2.1.12 - update to newer release

1229307 - /etc/mailman has wrong permissions 0755 instead of 2775

 

6. Package List:

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

mailman-2.1.15-21.el7_1.src.rpm

 

ppc64:

mailman-2.1.15-21.el7_1.ppc64.rpm

mailman-debuginfo-2.1.15-21.el7_1.ppc64.rpm

 

s390x:

mailman-2.1.15-21.el7_1.s390x.rpm

mailman-debuginfo-2.1.15-21.el7_1.s390x.rpm

 

x86_64:

mailman-2.1.15-21.el7_1.x86_64.rpm

mailman-debuginfo-2.1.15-21.el7_1.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 7):

 

Source:

mailman-2.1.15-21.ael7b_1.src.rpm

 

ppc64le:

mailman-2.1.15-21.ael7b_1.ppc64le.rpm

mailman-debuginfo-2.1.15-21.ael7b_1.ppc64le.rpm

 

Red Hat Enterprise Linux Workstation (v. 7):

 

Source:

mailman-2.1.15-21.el7_1.src.rpm

 

x86_64:

mailman-2.1.15-21.el7_1.x86_64.rpm

mailman-debuginfo-2.1.15-21.el7_1.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/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2015-2775

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2015 Red Hat, Inc.

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