RHSA-2007:0737-02 Moderate: pam security, bug fix, and enhancement update
Posted on: 11/15/2007 05:25 PM

A new update is available for Red Hat Enterprise Linux. Here the announcement:

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Red Hat Security Advisory

Synopsis: Moderate: pam security, bug fix, and enhancement update
Advisory ID: RHSA-2007:0737-02
Advisory URL: https://rhn.redhat.com/errata/RHSA-2007-0737.html
Issue date: 2007-11-15
Updated on: 2007-11-15
Product: Red Hat Enterprise Linux
Keywords: limits audit device ownership xauthority priority tally
CVE Names: CVE-2007-1716 CVE-2007-3102
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1. Summary:

Updated pam packages that fix two security flaws, resolve two bugs, and
add an enhancement are now available for Red Hat Enterprise Linux 4.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

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

3. Problem description:

Pluggable Authentication Modules (PAM) provide a system whereby
administrators can set up authentication policies without having to
recompile programs that handle authentication.

A flaw was found in the way pam_console set console device permissions. It
was possible for various console devices to retain ownership of the console
user after logging out, possibly leaking information to another local user.
(CVE-2007-1716)

A flaw was found in the way the PAM library wrote account names to the
audit subsystem. An attacker could inject strings containing parts of audit
messages, which could possibly mislead or confuse audit log parsing tools.
(CVE-2007-3102)

As well, these updated packages fix the following bugs:

* the pam_xauth module, which is used for copying the X11 authentication
cookie, did not reset the "XAUTHORITY" variable in certain circumstances,
causing unnecessary delays when using su command.

* when calculating password similarity, pam_cracklib disregarded changes
to the last character in passwords when "difok=x" (where "x" is the
number of characters required to change) was configured in
"/etc/pam.d/system-auth". This resulted in password changes that should
have been successful to fail with the following error:

BAD PASSWORD: is too similar to the old one

This issue has been resolved in these updated packages.

* the pam_limits module, which provides setting up system resources limits
for user sessions, reset the nice priority of the user session to "0" if it
was not configured otherwise in the "/etc/security/limits.conf"
configuration file.

These updated packages add the following enhancement:

* a new PAM module, pam_tally2, which allows accounts to be locked after a
maximum number of failed log in attempts.

All users of PAM should upgrade to these updated packages, which resolve
these issues and add this enhancement.

4. Solution:

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

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/FAQ_58_10188


5. Bug IDs fixed (http://bugzilla.redhat.com/):

228980 - XAUTHORITY env var not reset on 'su -'
230823 - CVE-2007-1716 Ownership of devices not returned to root after logout from console
247797 - CVE-2007-3102 audit logging of failed logins
267201 - pam_cracklib.so disregards changes to last char when calculating similarity

6. RPMs required:

Red Hat Enterprise Linux AS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/pam-0.77-66.23.src.rpm
280fdb2b65b60c9f4289efbf9362f246 pam-0.77-66.23.src.rpm

i386:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm

ia64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
c23638544883ca4eccc5ac7a34af78bc pam-0.77-66.23.ia64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
90fcc91636557a9c70a721e4d836f8dd pam-debuginfo-0.77-66.23.ia64.rpm
e707127a2b6748373f521654333018e7 pam-devel-0.77-66.23.ia64.rpm

ppc:
edb7fe8063315a76ef42285ec758fc49 pam-0.77-66.23.ppc.rpm
a20e6dd507568b4e4d78734772d48013 pam-0.77-66.23.ppc64.rpm
45d2d248fbc8ffa2d8cbdaa232904b87 pam-debuginfo-0.77-66.23.ppc.rpm
331bdef816b228635bb5831343d4d03f pam-debuginfo-0.77-66.23.ppc64.rpm
dff686e760e6db61bcd5e526dbc37415 pam-devel-0.77-66.23.ppc.rpm
d60805d695d5f00b15dd61a2f4547fb4 pam-devel-0.77-66.23.ppc64.rpm

s390:
7e14ae2d5fae071fdc976b59d0bd7503 pam-0.77-66.23.s390.rpm
81b0d2a8642fda0e80109e9bcd93d981 pam-debuginfo-0.77-66.23.s390.rpm
1e69ba88bb46d7b087c65330b26140fa pam-devel-0.77-66.23.s390.rpm

s390x:
7e14ae2d5fae071fdc976b59d0bd7503 pam-0.77-66.23.s390.rpm
37d92cc5118f527d7257be350edc8934 pam-0.77-66.23.s390x.rpm
81b0d2a8642fda0e80109e9bcd93d981 pam-debuginfo-0.77-66.23.s390.rpm
0f3d8a73291ad04c89cce34f32a1589c pam-debuginfo-0.77-66.23.s390x.rpm
1e69ba88bb46d7b087c65330b26140fa pam-devel-0.77-66.23.s390.rpm
5e7853af7d8905b4375f68bca57da149 pam-devel-0.77-66.23.s390x.rpm

x86_64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
03ec1abab5c5ab9395d59b70c7f4ec36 pam-0.77-66.23.x86_64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
0a8738a21ed748b168cc9f55a61ab423 pam-debuginfo-0.77-66.23.x86_64.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm
1e5df76e71f24d346b4bd55e00cdaf0c pam-devel-0.77-66.23.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/pam-0.77-66.23.src.rpm
280fdb2b65b60c9f4289efbf9362f246 pam-0.77-66.23.src.rpm

i386:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm

x86_64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
03ec1abab5c5ab9395d59b70c7f4ec36 pam-0.77-66.23.x86_64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
0a8738a21ed748b168cc9f55a61ab423 pam-debuginfo-0.77-66.23.x86_64.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm
1e5df76e71f24d346b4bd55e00cdaf0c pam-devel-0.77-66.23.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/pam-0.77-66.23.src.rpm
280fdb2b65b60c9f4289efbf9362f246 pam-0.77-66.23.src.rpm

i386:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm

ia64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
c23638544883ca4eccc5ac7a34af78bc pam-0.77-66.23.ia64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
90fcc91636557a9c70a721e4d836f8dd pam-debuginfo-0.77-66.23.ia64.rpm
e707127a2b6748373f521654333018e7 pam-devel-0.77-66.23.ia64.rpm

x86_64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
03ec1abab5c5ab9395d59b70c7f4ec36 pam-0.77-66.23.x86_64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
0a8738a21ed748b168cc9f55a61ab423 pam-debuginfo-0.77-66.23.x86_64.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm
1e5df76e71f24d346b4bd55e00cdaf0c pam-devel-0.77-66.23.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

SRPMS:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/pam-0.77-66.23.src.rpm
280fdb2b65b60c9f4289efbf9362f246 pam-0.77-66.23.src.rpm

i386:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm

ia64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
c23638544883ca4eccc5ac7a34af78bc pam-0.77-66.23.ia64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
90fcc91636557a9c70a721e4d836f8dd pam-debuginfo-0.77-66.23.ia64.rpm
e707127a2b6748373f521654333018e7 pam-devel-0.77-66.23.ia64.rpm

x86_64:
f83fa911b83700f7767907e20d7c4d45 pam-0.77-66.23.i386.rpm
03ec1abab5c5ab9395d59b70c7f4ec36 pam-0.77-66.23.x86_64.rpm
e9c41fa27b60845f56e15d63ac1335d0 pam-debuginfo-0.77-66.23.i386.rpm
0a8738a21ed748b168cc9f55a61ab423 pam-debuginfo-0.77-66.23.x86_64.rpm
7568bb0d75d41951a3956e1128787e78 pam-devel-0.77-66.23.i386.rpm
1e5df76e71f24d346b4bd55e00cdaf0c pam-devel-0.77-66.23.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1716
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3102
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is lt;secalert@redhat.comgt;. More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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