Synopsis

Moderate: pam security, bug fix, and enhancement update

Type/Severity

Security Advisory: Moderate

Topic

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.

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.

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 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

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

CVEs

• CVE-2007-1716
• CVE-2007-3102

References

• http://www.redhat.com/security/updates/classification/#moderate

Red Hat Enterprise Linux Server 4

SRPM
pam-0.77-66.23.src.rpm	SHA-256: 274233e0fe500ce8d5a96d7c197bb8a41733654aeb9c3828a8001c86e4e57d52
x86_64
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.x86_64.rpm	SHA-256: c7730884ce90ecc119f86222b2ddc0e2840efb1d74f158cacbb23e3abcfb20cf
pam-0.77-66.23.x86_64.rpm	SHA-256: c7730884ce90ecc119f86222b2ddc0e2840efb1d74f158cacbb23e3abcfb20cf
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa
pam-devel-0.77-66.23.x86_64.rpm	SHA-256: f9bc14c2c4ca3b51877a5e2f6c50ca22885cbe86db67947795b9774b11350c19
pam-devel-0.77-66.23.x86_64.rpm	SHA-256: f9bc14c2c4ca3b51877a5e2f6c50ca22885cbe86db67947795b9774b11350c19
ia64
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.ia64.rpm	SHA-256: 531402b735e3c24dc485a88ab326098e50a9ee4cde9af8ca41540ce586143f6d
pam-0.77-66.23.ia64.rpm	SHA-256: 531402b735e3c24dc485a88ab326098e50a9ee4cde9af8ca41540ce586143f6d
pam-devel-0.77-66.23.ia64.rpm	SHA-256: 74117971cfda39cd3bc4d51d70dae49b8f9e5917d428afa11203657d6a43355a
pam-devel-0.77-66.23.ia64.rpm	SHA-256: 74117971cfda39cd3bc4d51d70dae49b8f9e5917d428afa11203657d6a43355a
i386
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa

Red Hat Enterprise Linux Workstation 4

SRPM
pam-0.77-66.23.src.rpm	SHA-256: 274233e0fe500ce8d5a96d7c197bb8a41733654aeb9c3828a8001c86e4e57d52
x86_64
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.x86_64.rpm	SHA-256: c7730884ce90ecc119f86222b2ddc0e2840efb1d74f158cacbb23e3abcfb20cf
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa
pam-devel-0.77-66.23.x86_64.rpm	SHA-256: f9bc14c2c4ca3b51877a5e2f6c50ca22885cbe86db67947795b9774b11350c19
ia64
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.ia64.rpm	SHA-256: 531402b735e3c24dc485a88ab326098e50a9ee4cde9af8ca41540ce586143f6d
pam-devel-0.77-66.23.ia64.rpm	SHA-256: 74117971cfda39cd3bc4d51d70dae49b8f9e5917d428afa11203657d6a43355a
i386
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa

Red Hat Enterprise Linux Desktop 4

SRPM
pam-0.77-66.23.src.rpm	SHA-256: 274233e0fe500ce8d5a96d7c197bb8a41733654aeb9c3828a8001c86e4e57d52
x86_64
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-0.77-66.23.x86_64.rpm	SHA-256: c7730884ce90ecc119f86222b2ddc0e2840efb1d74f158cacbb23e3abcfb20cf
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa
pam-devel-0.77-66.23.x86_64.rpm	SHA-256: f9bc14c2c4ca3b51877a5e2f6c50ca22885cbe86db67947795b9774b11350c19
i386
pam-0.77-66.23.i386.rpm	SHA-256: b60a1fee1c70a817a3294abdc6b11aa62cf35e6e0b379b1522e397654b1dbc0d
pam-devel-0.77-66.23.i386.rpm	SHA-256: f40b7b20362ddb2fe1422a461464371973786d0ec57e1e3060595ae2f7cc7cfa

Red Hat Enterprise Linux for IBM z Systems 4

SRPM
pam-0.77-66.23.src.rpm	SHA-256: 274233e0fe500ce8d5a96d7c197bb8a41733654aeb9c3828a8001c86e4e57d52
s390x
pam-0.77-66.23.s390.rpm	SHA-256: 04655a36e1b829079a0e06c833613990cdbbd74922557d3a133626597831d47c
pam-0.77-66.23.s390x.rpm	SHA-256: 19e2fb3564fceca203317bf3992c893fa8eb6d3ee41ad58b23881faaeac2a74d
pam-devel-0.77-66.23.s390.rpm	SHA-256: 8b5381d00e6b41e8b8b886fdb2a72f466bb7ec3c21d8386cffa7a8d85e897471
pam-devel-0.77-66.23.s390x.rpm	SHA-256: 67535b057a13d191b2d8240b5d8137592d14dc616bf09bd351cd22ead6cbddd6
s390
pam-0.77-66.23.s390.rpm	SHA-256: 04655a36e1b829079a0e06c833613990cdbbd74922557d3a133626597831d47c
pam-devel-0.77-66.23.s390.rpm	SHA-256: 8b5381d00e6b41e8b8b886fdb2a72f466bb7ec3c21d8386cffa7a8d85e897471

Red Hat Enterprise Linux for Power, big endian 4

SRPM
pam-0.77-66.23.src.rpm	SHA-256: 274233e0fe500ce8d5a96d7c197bb8a41733654aeb9c3828a8001c86e4e57d52
ppc
pam-0.77-66.23.ppc.rpm	SHA-256: 3e8df222ef33cfccd91f208848151d5655f7e08e3f5c38d288f1eab7b15b4014
pam-0.77-66.23.ppc64.rpm	SHA-256: 52b18b7f383130ab2fa3425ff431108112e7844090dd76f2cafc17e97114800c
pam-devel-0.77-66.23.ppc.rpm	SHA-256: 44d73a0b59483e17ffb195df36644043c64a5d370d48514994cf6695a41ca12b
pam-devel-0.77-66.23.ppc64.rpm	SHA-256: 3b1f89812f57be1ceaa2945a2b93835bf812524b570f343dce5e20d639e165b4