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Test ID:1.3.6.1.4.1.25623.1.0.51044
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2004:304
Summary:NOSUMMARY
Description:Description:

The remote host is missing updates announced in
advisory RHSA-2004:304.

PAM (Pluggable Authentication Modules) is a system security tool that
allows system administrators to set an authentication policy without
having to recompile programs that handle authentication.

These updates fix a potential security problem present in the
pam_wheel module. These updates correct a bug in the pam_lastlog
module which prevented it from properly manipulating the /var/log/lastlog
entry for users with very high user IDs.

The pam_wheel module is used to restrict access to a particular service
based on group membership. If the pam_wheel module was used with the
trust option enabled, but without the use_uid option, any local
user would be able to spoof the username returned by getlogin(). The user
could therefore gain access to a superuser account without supplying a
password. In Red Hat Enterprise Linux 2.1, pam_wheel is not used by
default. The Common Vulnerabilities and Exposures project (cve.mitre.org)
has assigned the name CVE-2003-0388 to this issue.

When manipulating the entry in /var/log/lastlog, which corresponds to a
given user, the pam_lastlog module calculates the location of the entry by
multiplying the UID and the length of an entry in the file. On some
systems, the result of this calculation would mistakenly be truncated to 32
bits for users with sufficiently high UIDs.

All users of pam should upgrade to these updated packages, which
resolve these issues.

Solution:
Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

http://rhn.redhat.com/errata/RHSA-2004-304.html

Risk factor : Medium

CVSS Score:
4.6

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2003-0388
Bugtraq: 20030616 FW: iDEFENSE Security Advisory 06.16.03: Linux-PAM getlogin() Spoofing (Google Search)
http://marc.info/?l=bugtraq&m=105577915506761&w=2
http://www.idefense.com/advisory/06.16.03.txt
http://www.redhat.com/support/errata/RHSA-2004-304.html
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