RHSA-2004:064 - Security Advisory

Topic

Updated Samba packages that fix a security vulnerability are now available.

Description

Samba provides file and printer sharing services to SMB/CIFS clients.

The Samba team discovered an issue that affects version 3.0.0 and 3.0.1 of
Samba. If an account for a user is created, but marked as disabled using
the mksmbpasswd script, it is possible for Samba to overwrite the user's
password with the contents of an uninitialized buffer. This might lead to
a disabled account becoming enabled with a password that could be guessed
by an attacker.

Although this is likely to be a low risk issue for most Samba users, we
have provided updated packages, which contain a backported patch correcting
this issue.

Red Hat would like to thank the Samba team for reporting this issue and
providing us with a patch.

Note: Due to a packaging error in samba-3.0.0-14.3E, the winbind daemon is
not automatically restarted when the Samba package is upgraded. After
up2date has installed the samba-3.0.2-4.3E packages, you must run
"/sbin/service winbind condrestart" as root to restart the winbind daemon.

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.

Affected Products

• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 114995 - CAN-2004-0082 mksmbpasswd vulnerability

CVEs

• CVE-2004-0082

References

(none)