RHBA-2010:0059 - Bug Fix Advisory

Topic

Updated pam packages that fix a bug are now available.

Description

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

These updated packages fix the following bug:

• the pam_time and pam_group modules, which support allowing or rejecting

authentication based on time and assigning group names respectively,
incorrectly matched user, service, or terminal name substrings even if no
wildcard was specified in the configuration. For example, "user" and
"user1" were incorrectly equated, causing policies to apply to both
usernames even when "user" was the only username subject to said policies.
This update improves the string matching in the pam_time and pam_group
modules ensuring such mis-matches (and consequent policy mis-applications)
no longer occur. (BZ#553590)

All pam users are advised to upgrade to these updated packages, which
resolve this issue.

Solution

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

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 for x86_64 - Extended Update Support 4.8 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.8 ia64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 4.8 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 IBM z Systems - Extended Update Support 4.8 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 4.8 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 4.8 ppc

Fixes

• BZ - 553590 - pam_time not handling usernames correctly

CVEs

(none)

References

(none)