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The remote Red Hat host is missing one or more security updates.
Updated pam packages that fix a security vulnerability are now
available for Red Hat Enterprise Linux 2.1.
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.
See also :
Update the affected pam and / or pam-devel packages.
Risk factor :
Medium / CVSS Base Score : 4.6
Family: Red Hat Local Security Checks
Nessus Plugin ID: 14310 ()
CVE ID: CVE-2003-0388
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