- ---------------------------------------------------------------------                   Red Hat Security Advisory

Synopsis:          Moderate: pam security, bug fix, and enhancement update
Advisory ID:       RHSA-2007:0555-04
Advisory URL:      https://access.redhat.com/errata/RHSA-2007:0555.html
Issue date:        2007-11-07
Updated on:        2007-11-07
Product:           Red Hat Enterprise Linux
Keywords:          limits namespace LSPP polyinstantiation audit device ownership tty SELinux
CVE Names:         CVE-2007-1716 CVE-2007-3102 
- ---------------------------------------------------------------------1. Summary:

Updated pam packages that fix two security flaws, resolve several bugs, and
add enhancements are now available for Red Hat Enterprise Linux 5.

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 Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, 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:

* truncated MD5-hashed passwords in "/etc/shadow" were treated as valid, 
resulting in insecure and invalid passwords.

* the pam_namespace module did not convert context names to raw format and
did not unmount polyinstantiated directories in some cases. It also crashed
when an unknown user name was used in "/etc/security/namespace.conf", the
pam_namespace configuration file.

* the pam_selinux module was not relabeling the controlling tty correctly,
and in some cases it did not send complete information about user role and
level change to the audit subsystem.

These updated packages add the following enhancements:

* pam_limits module now supports parsing additional config files placed
into the /etc/security/limits.d/ directory. These files are read after the
main configuration file.

* the modules pam_limits, pam_access, and pam_time now send a message to
the audit subsystem when a user is denied access based on the number of
login sessions, origin of user, and time of login.

* pam_unix module security properties were improved. Functionality in the
setuid helper binary, unix_chkpwd, which was not required for user
authentication, was moved to a new non-setuid helper binary, unix_update.

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

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


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

227345 - pam_namespace should convert the context names before it uses them as filenames
230120 - LSPP: Not able to log into the machine with large number of categories
232993 - FIPS 200: audit rejection based on number of sessions, origin and time
233581 - CVE-2007-1716 Ownership of devices not returned to root after logout from console
234513 - [LSPP] pam_namespace crashes with non-existent users in namespace.conf
234781 - [LSPP] incorrect information in pam_selinux audit record
236316 - LSPP: Unable to change expired password on ssh login
237163 - namespace.conf: $HOME used in polyinstantiated directory name not being expanded
237249 - LSPP: polyinstantiation behavior correct and documented
243204 - CVE-2007-3102 audit logging of failed logins

6. RPMs required:

Red Hat Enterprise Linux Desktop (v. 5 client):

SRPMS:
8d551576c99cc43b6ec69d1372bb8d0d  pam-0.99.6.2-3.26.el5.src.rpm

i386:
84d48c3be0870e9dbfe2dc27395de114  pam-0.99.6.2-3.26.el5.i386.rpm
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm

x86_64:
84d48c3be0870e9dbfe2dc27395de114  pam-0.99.6.2-3.26.el5.i386.rpm
5372f04b4d5c7e311ccbc470b0ce296a  pam-0.99.6.2-3.26.el5.x86_64.rpm
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
296cd65817f32b98dc9f0d6be63e779d  pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

SRPMS:
8d551576c99cc43b6ec69d1372bb8d0d  pam-0.99.6.2-3.26.el5.src.rpm

i386:
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
d622f4f24b1022924db60a27c510ac7c  pam-devel-0.99.6.2-3.26.el5.i386.rpm

x86_64:
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
296cd65817f32b98dc9f0d6be63e779d  pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm
d622f4f24b1022924db60a27c510ac7c  pam-devel-0.99.6.2-3.26.el5.i386.rpm
4c244fb63c0f7404ebad4f9b2c8023d9  pam-devel-0.99.6.2-3.26.el5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

SRPMS:
8d551576c99cc43b6ec69d1372bb8d0d  pam-0.99.6.2-3.26.el5.src.rpm

i386:
84d48c3be0870e9dbfe2dc27395de114  pam-0.99.6.2-3.26.el5.i386.rpm
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
d622f4f24b1022924db60a27c510ac7c  pam-devel-0.99.6.2-3.26.el5.i386.rpm

ia64:
84d48c3be0870e9dbfe2dc27395de114  pam-0.99.6.2-3.26.el5.i386.rpm
f1107cda14d5f5e06c34567f4c960ce9  pam-0.99.6.2-3.26.el5.ia64.rpm
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
567b72218dac642e9ab0e211df9aa025  pam-debuginfo-0.99.6.2-3.26.el5.ia64.rpm
71b979597060947cc876725399b9f110  pam-devel-0.99.6.2-3.26.el5.ia64.rpm

ppc:
b8bdf7f7059ef8b82c48477373db3d9a  pam-0.99.6.2-3.26.el5.ppc.rpm
d513db5dc35eed0401410bf4bff2bd78  pam-0.99.6.2-3.26.el5.ppc64.rpm
9f11916618717cbd1a58b667ad35beb5  pam-debuginfo-0.99.6.2-3.26.el5.ppc.rpm
8496bc7427358b5f0435b04af8e9c0d6  pam-debuginfo-0.99.6.2-3.26.el5.ppc64.rpm
83b06532e32e2e3f61e52b67af67e1df  pam-devel-0.99.6.2-3.26.el5.ppc.rpm
19bc56166f397d5507ee63419c30c425  pam-devel-0.99.6.2-3.26.el5.ppc64.rpm

s390x:
c9a1ffc67c7eb25e418130f48962f20f  pam-0.99.6.2-3.26.el5.s390.rpm
b1208395f4bbe301a56fd0d1a263b0cd  pam-0.99.6.2-3.26.el5.s390x.rpm
9cb56666c2455672a440b85be60417b3  pam-debuginfo-0.99.6.2-3.26.el5.s390.rpm
0ed494671540c9f78406f3b0b3b64f64  pam-debuginfo-0.99.6.2-3.26.el5.s390x.rpm
a63e62356e6ffd4a964212e4da6ec3e2  pam-devel-0.99.6.2-3.26.el5.s390.rpm
9472719bcff3e5d4244da94b32443dbf  pam-devel-0.99.6.2-3.26.el5.s390x.rpm

x86_64:
84d48c3be0870e9dbfe2dc27395de114  pam-0.99.6.2-3.26.el5.i386.rpm
5372f04b4d5c7e311ccbc470b0ce296a  pam-0.99.6.2-3.26.el5.x86_64.rpm
c1b7da6238f60f4debac539d71b53222  pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
296cd65817f32b98dc9f0d6be63e779d  pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm
d622f4f24b1022924db60a27c510ac7c  pam-devel-0.99.6.2-3.26.el5.i386.rpm
4c244fb63c0f7404ebad4f9b2c8023d9  pam-devel-0.99.6.2-3.26.el5.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 .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.

RedHat: Moderate: pam security, bug fix, RHSA-2007:0555-04

Updated pam packages that fix two security flaws, resolve several bugs, and add enhancements are now available for Red Hat Enterprise Linux 5

Summary

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: * truncated MD5-hashed passwords in "/etc/shadow" were treated as valid, resulting in insecure and invalid passwords. * the pam_namespace module did not convert context names to raw format and did not unmount polyinstantiated directories in some cases. It also crashed when an unknown user name was used in "/etc/security/namespace.conf", the pam_namespace configuration file. * the pam_selinux module was not relabeling the controlling tty correctly, and in some cases it did not send complete information about user role and level change to the audit subsystem. These updated packages add the following enhancements: * pam_limits module now supports parsing additional config files placed into the /etc/security/limits.d/ directory. These files are read after the main configuration file. * the modules pam_limits, pam_access, and pam_time now send a message to the audit subsystem when a user is denied access based on the number of login sessions, origin of user, and time of login. * pam_unix module security properties were improved. Functionality in the setuid helper binary, unix_chkpwd, which was not required for user authentication, was moved to a new non-setuid helper binary, unix_update. All users of PAM should upgrade to these updated packages, which resolve these issues and add these enhancements.

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

5. Bug IDs fixed (http://bugzilla.redhat.com/):
227345 - pam_namespace should convert the context names before it uses them as filenames 230120 - LSPP: Not able to log into the machine with large number of categories 232993 - FIPS 200: audit rejection based on number of sessions, origin and time 233581 - CVE-2007-1716 Ownership of devices not returned to root after logout from console 234513 - [LSPP] pam_namespace crashes with non-existent users in namespace.conf 234781 - [LSPP] incorrect information in pam_selinux audit record 236316 - LSPP: Unable to change expired password on ssh login 237163 - namespace.conf: $HOME used in polyinstantiated directory name not being expanded 237249 - LSPP: polyinstantiation behavior correct and documented 243204 - CVE-2007-3102 audit logging of failed logins
6. RPMs required:
Red Hat Enterprise Linux Desktop (v. 5 client):
SRPMS: 8d551576c99cc43b6ec69d1372bb8d0d pam-0.99.6.2-3.26.el5.src.rpm
i386: 84d48c3be0870e9dbfe2dc27395de114 pam-0.99.6.2-3.26.el5.i386.rpm c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm
x86_64: 84d48c3be0870e9dbfe2dc27395de114 pam-0.99.6.2-3.26.el5.i386.rpm 5372f04b4d5c7e311ccbc470b0ce296a pam-0.99.6.2-3.26.el5.x86_64.rpm c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm 296cd65817f32b98dc9f0d6be63e779d pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
SRPMS: 8d551576c99cc43b6ec69d1372bb8d0d pam-0.99.6.2-3.26.el5.src.rpm
i386: c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm d622f4f24b1022924db60a27c510ac7c pam-devel-0.99.6.2-3.26.el5.i386.rpm
x86_64: c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm 296cd65817f32b98dc9f0d6be63e779d pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm d622f4f24b1022924db60a27c510ac7c pam-devel-0.99.6.2-3.26.el5.i386.rpm 4c244fb63c0f7404ebad4f9b2c8023d9 pam-devel-0.99.6.2-3.26.el5.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
SRPMS: 8d551576c99cc43b6ec69d1372bb8d0d pam-0.99.6.2-3.26.el5.src.rpm
i386: 84d48c3be0870e9dbfe2dc27395de114 pam-0.99.6.2-3.26.el5.i386.rpm c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm d622f4f24b1022924db60a27c510ac7c pam-devel-0.99.6.2-3.26.el5.i386.rpm
ia64: 84d48c3be0870e9dbfe2dc27395de114 pam-0.99.6.2-3.26.el5.i386.rpm f1107cda14d5f5e06c34567f4c960ce9 pam-0.99.6.2-3.26.el5.ia64.rpm c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm 567b72218dac642e9ab0e211df9aa025 pam-debuginfo-0.99.6.2-3.26.el5.ia64.rpm 71b979597060947cc876725399b9f110 pam-devel-0.99.6.2-3.26.el5.ia64.rpm
ppc: b8bdf7f7059ef8b82c48477373db3d9a pam-0.99.6.2-3.26.el5.ppc.rpm d513db5dc35eed0401410bf4bff2bd78 pam-0.99.6.2-3.26.el5.ppc64.rpm 9f11916618717cbd1a58b667ad35beb5 pam-debuginfo-0.99.6.2-3.26.el5.ppc.rpm 8496bc7427358b5f0435b04af8e9c0d6 pam-debuginfo-0.99.6.2-3.26.el5.ppc64.rpm 83b06532e32e2e3f61e52b67af67e1df pam-devel-0.99.6.2-3.26.el5.ppc.rpm 19bc56166f397d5507ee63419c30c425 pam-devel-0.99.6.2-3.26.el5.ppc64.rpm
s390x: c9a1ffc67c7eb25e418130f48962f20f pam-0.99.6.2-3.26.el5.s390.rpm b1208395f4bbe301a56fd0d1a263b0cd pam-0.99.6.2-3.26.el5.s390x.rpm 9cb56666c2455672a440b85be60417b3 pam-debuginfo-0.99.6.2-3.26.el5.s390.rpm 0ed494671540c9f78406f3b0b3b64f64 pam-debuginfo-0.99.6.2-3.26.el5.s390x.rpm a63e62356e6ffd4a964212e4da6ec3e2 pam-devel-0.99.6.2-3.26.el5.s390.rpm 9472719bcff3e5d4244da94b32443dbf pam-devel-0.99.6.2-3.26.el5.s390x.rpm
x86_64: 84d48c3be0870e9dbfe2dc27395de114 pam-0.99.6.2-3.26.el5.i386.rpm 5372f04b4d5c7e311ccbc470b0ce296a pam-0.99.6.2-3.26.el5.x86_64.rpm c1b7da6238f60f4debac539d71b53222 pam-debuginfo-0.99.6.2-3.26.el5.i386.rpm 296cd65817f32b98dc9f0d6be63e779d pam-debuginfo-0.99.6.2-3.26.el5.x86_64.rpm d622f4f24b1022924db60a27c510ac7c pam-devel-0.99.6.2-3.26.el5.i386.rpm 4c244fb63c0f7404ebad4f9b2c8023d9 pam-devel-0.99.6.2-3.26.el5.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

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

Package List

Severity

Advisory ID: RHSA-2007:0555-04

Advisory URL: https://access.redhat.com/errata/RHSA-2007:0555.html

Issued Date: : 2007-11-07

Updated on: 2007-11-07

Product: Red Hat Enterprise Linux

Keywords: limits namespace LSPP polyinstantiation audit device ownership tty SELinux

CVE Names: CVE-2007-1716 CVE-2007-3102 Updated pam packages that fix two security flaws, resolve several bugs, and add enhancements are now available for Red Hat Enterprise Linux 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team.