Moderate: libuser security update

Updated libuser packages that fix one security issue are now available for
Red Hat Enterprise Linux 4, 5, and 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

The libuser library implements a standardized interface for manipulating
and administering user and group accounts. Sample applications that are
modeled after applications from the shadow password suite (shadow-utils)
are included in these packages.

It was discovered that libuser did not set the password entry correctly
when creating LDAP (Lightweight Directory Access Protocol) users. If an
administrator did not assign a password to an LDAP based user account,
either at account creation with luseradd, or with lpasswd after account
creation, an attacker could use this flaw to log into that account with a
default password string that should have been rejected. (CVE-2011-0002)

Note: LDAP administrators that have used libuser tools to add users should
check existing user accounts for plain text passwords, and reset them as
necessary.

Users of libuser should upgrade to these updated packages, which contain a
backported patch to correct this issue.

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

643227 - CVE-2011-0002 libuser creates LDAP users with a default password

https://www.redhat.com/security/data/cve/CVE-2011-0002.html
https://access.redhat.com/security/updates/classification/#moderate