New util-linux packages available to fix /bin/login pam problem

New util-linux packages are available that fix a problem with /bin/login's
PAM implementation. This could, in some non-default setups, cause users to
receive credentials of other users. It is recommended that all users
update to the fixed packages.

2001-10-22: Packages are now available for Red Hat Linux 7.2. Notably,
these packages also fix the problem noted in RHSA-2001:095-04 (vipw
incorrectly setting permissions on some files) - this bug was accidentally
reintroduced in Red Hat Linux 7.2.

A problem existed in /bin/login's PAM implementation; it stored the value
of a static pwent buffer across PAM calls; when used with some PAM modules
in non-default configuration (such as pam_limits), it would overwrite the
buffer, causing a user to get credentials of another user.

Thanks go to Tarhon-Onu Victor <mituc@ac.tuiasi.ro> for bringing the
problem to our attention, and to Olaf Kirch <okir@caldera.de> for providing
the patch.

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains
the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

51646 - pam limits drops other user privileges

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-1147
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-1175

login, pam, pam_limits