RHSA-2007:0235 - Security Advisory

Topic

An updated util-linux package that corrects a security issue and fixes
several bugs is now available.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

Description

The util-linux package contains a collection of basic system utilities.

A flaw was found in the way the login process handled logins which did not
require authentication. Certain processes which conduct their own
authentication could allow a remote user to bypass intended access policies
which would normally be enforced by the login process. (CVE-2006-7108)

This update also fixes the following bugs:

• The partx, addpart and delpart commands were not documented.
• The "umount -l" command did not work on hung NFS mounts with cached data.
• The mount command did not mount NFS V3 share where sec=none was specified.
• The mount command did not read filesystem LABEL from unpartitioned disks.
• The mount command did not recognize labels on VFAT filesystems.
• The fdisk command did not support 4096 sector size for the "-b" option.
• The mount man page did not list option "mand" or information about

/etc/mtab limitations.

All users of util-linux should upgrade to these updated packages, which
contain backported patches to correct these issues.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

Affected Products

• Red Hat Enterprise Linux Server 4 x86_64
• Red Hat Enterprise Linux Server 4 ia64
• Red Hat Enterprise Linux Server 4 i386
• Red Hat Enterprise Linux Workstation 4 x86_64
• Red Hat Enterprise Linux Workstation 4 ia64
• Red Hat Enterprise Linux Workstation 4 i386
• Red Hat Enterprise Linux Desktop 4 x86_64
• Red Hat Enterprise Linux Desktop 4 i386
• Red Hat Enterprise Linux for IBM z Systems 4 s390x
• Red Hat Enterprise Linux for IBM z Systems 4 s390
• Red Hat Enterprise Linux for Power, big endian 4 ppc

Fixes

• BZ - 169299 - umount -l should work on hung NFS mounts with cached data
• BZ - 177331 - CVE-2006-7108 login omits pam_acct_mgmt & pam_chauthtok when authentication is skipped.
• BZ - 187370 - Unable to mount NFS V3 share where sec=none is specified
• BZ - 188099 - can't mount iscsi ext3 fs by label.
• BZ - 197768 - man mount' does not list option 'mand'

CVEs

• CVE-2006-7108

References

• http://www.redhat.com/security/updates/classification/#low