Issued:
2007-11-07
Updated:
2007-11-07

RHSA-2007:0555 - Security Advisory

Synopsis

Moderate: pam security, bug fix, and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

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.

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.

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

Affected Products

  • Red Hat Enterprise Linux Server 5 x86_64
  • Red Hat Enterprise Linux Server 5 ia64
  • Red Hat Enterprise Linux Server 5 i386
  • Red Hat Enterprise Linux Workstation 5 x86_64
  • Red Hat Enterprise Linux Workstation 5 i386
  • Red Hat Enterprise Linux Desktop 5 x86_64
  • Red Hat Enterprise Linux Desktop 5 i386
  • Red Hat Enterprise Linux for IBM z Systems 5 s390x
  • Red Hat Enterprise Linux for Power, big endian 5 ppc
  • Red Hat Enterprise Linux Server from RHUI 5 x86_64
  • Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

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

CVEs

References

Red Hat Enterprise Linux Server 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
x86_64
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 8edb39d05b6322ba3851181bdea302c5afeeb6d7fca7bd4c09eaecbede8f056d
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2
pam-devel-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 4b59c2535c926fe0772b7b858770b966a543a641cbb1937e9d2d384e6bbb6805
ia64
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-0.99.6.2-3.26.el5.ia64.rpm SHA-256: 3b0aaf2e4b2cc59ca44df900522d1f828082ba0a3af190fc6ff8395af6ff342d
pam-devel-0.99.6.2-3.26.el5.ia64.rpm SHA-256: 4d39ddbb578c9f42edf4164412cb397d21097c34608b845c7858c16417fa2443
i386
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2

Red Hat Enterprise Linux Workstation 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
x86_64
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 8edb39d05b6322ba3851181bdea302c5afeeb6d7fca7bd4c09eaecbede8f056d
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2
pam-devel-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 4b59c2535c926fe0772b7b858770b966a543a641cbb1937e9d2d384e6bbb6805
i386
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2

Red Hat Enterprise Linux Desktop 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
x86_64
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 8edb39d05b6322ba3851181bdea302c5afeeb6d7fca7bd4c09eaecbede8f056d
i386
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6

Red Hat Enterprise Linux for IBM z Systems 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
s390x
pam-0.99.6.2-3.26.el5.s390.rpm SHA-256: 87fd389f23a885bd394886c49be791bfaf8a2531ec823926ca8f1f457910bf16
pam-0.99.6.2-3.26.el5.s390x.rpm SHA-256: ecbc5adf112bf0c6c51aecb3694f3533b2ab91c42d22a1c4c78991ad19ce506e
pam-devel-0.99.6.2-3.26.el5.s390.rpm SHA-256: 184ab947b279d22a76688bb3c5c6a167bb2bb3e2d61bca84a424c6a9e3d84e72
pam-devel-0.99.6.2-3.26.el5.s390x.rpm SHA-256: a4ce345000450f2880b93e6cf1781c6a8576449e9a083c3f8a9407ac2803c84f

Red Hat Enterprise Linux for Power, big endian 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
ppc
pam-0.99.6.2-3.26.el5.ppc.rpm SHA-256: 1b5cd01a84ebb17f9800abdae9723bed2744f9ded140b683820abac50af47b3d
pam-0.99.6.2-3.26.el5.ppc64.rpm SHA-256: 4b8dce0a5fe8fdf92e9cd07ac694d3ef996490128cc6e2d597917c54302ae367
pam-devel-0.99.6.2-3.26.el5.ppc.rpm SHA-256: c5d13bc0ee872eed5bde1896f52067b208ef7aaa297b1a3a032c945712624d15
pam-devel-0.99.6.2-3.26.el5.ppc64.rpm SHA-256: 6c23a75321a73c7890498ce58f0bc88445face89e0554c9d4a0447a6794572c6

Red Hat Enterprise Linux Server from RHUI 5

SRPM
pam-0.99.6.2-3.26.el5.src.rpm SHA-256: 11f45241075c9bfd4a7e29162546ca0546bcb8cf090d2dff9f81a7076511674c
x86_64
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 8edb39d05b6322ba3851181bdea302c5afeeb6d7fca7bd4c09eaecbede8f056d
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2
pam-devel-0.99.6.2-3.26.el5.x86_64.rpm SHA-256: 4b59c2535c926fe0772b7b858770b966a543a641cbb1937e9d2d384e6bbb6805
i386
pam-0.99.6.2-3.26.el5.i386.rpm SHA-256: ec28e5ef531d8836d9d406a14fe1bda9f921181a210819a1f43510598593dfe6
pam-devel-0.99.6.2-3.26.el5.i386.rpm SHA-256: 05fac7750067715113369bf40be9e062feab75012bc6c87a1f2267c3255d44b2

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.