1. Topic:

When LPRng drops uid and gid, it fails to drop membership in its
supplemental groups.

2. Problem description:

LPRng fails to drop supplemental group membership at init time, though it
does properly setuid and setgid. The result is that LPRng, and its
children, maintain any supplemental groups that the process starting LPRng
had at the time it started LPRng. This is a security risk.

3. Bug IDs fixed: (see bugzilla for more information)

43341 - lpd fails to drop groups of root

4. Relevant releases/architectures:

Red Hat Linux 7.0 - alpha, i386
Red Hat Linux 7.1 - i386

5. RPMs required:

Red Hat Linux 7.0:

SRPMS:
ftp://updates.redhat.com/7.0/en/os/SRPMS/LPRng-3.7.4-23.src.rpm

alpha:
ftp://updates.redhat.com/7.0/en/os/alpha/LPRng-3.7.4-23.alpha.rpm

i386:
ftp://updates.redhat.com/7.0/en/os/i386/LPRng-3.7.4-23.i386.rpm

Red Hat Linux 7.1:

SRPMS:
ftp://updates.redhat.com/7.1/en/os/SRPMS/LPRng-3.7.4-23.src.rpm

i386:
ftp://updates.redhat.com/7.1/en/os/i386/LPRng-3.7.4-23.i386.rpm

6. Solution:

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.

7. Verification:

MD5 sum                           Package Name
-------------------------------------------------------------------------
9a9a148f44c80cb83a1cc53b7fc60492 7.0/en/os/SRPMS/LPRng-3.7.4-23.src.rpm
3a83c1cdf9eef8bbc72bd511264a0fc3 7.0/en/os/alpha/LPRng-3.7.4-23.alpha.rpm
23e85c03c49b6d1eda0a76428f181dc5 7.0/en/os/i386/LPRng-3.7.4-23.i386.rpm
9a9a148f44c80cb83a1cc53b7fc60492 7.1/en/os/SRPMS/LPRng-3.7.4-23.src.rpm
23e85c03c49b6d1eda0a76428f181dc5 7.1/en/os/i386/LPRng-3.7.4-23.i386.rpm