RHSA-2004:259 - Security Advisory

Topic

Updated samba packages that fix buffer overflows, as well as other various
bugs, are now available.

Description

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

Evgeny Demidov discovered a flaw in the internal routine used by the Samba
Web Administration Tool (SWAT) in Samba versions 3.0.2 through 3.0.4. When
decoding base-64 data during HTTP basic authentication, an invalid base-64
character could cause a buffer overflow. If the SWAT administration
service is enabled, this flaw could allow an attacker to execute arbitrary
code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2004-0600 to this issue.

Additionally, the Samba team discovered a buffer overflow in the code used
to support the 'mangling method = hash' smb.conf option. Please be aware
that the default setting for this parameter is 'mangling method = hash2'
and therefore not vulnerable. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CAN-2004-0686 to this issue.

This release includes the updated upstream version 3.0.4 together with
backported security patches to correct these issues as well as a number of
post-3.0.4 bug fixes from the Samba subversion repository.

The most important bug fix allows Samba users to change their passwords
if Microsoft patch KB 828741 (a critical update) had been applied.

All users of Samba should upgrade to these updated packages, which
resolve 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 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 - 102715 - samba spec needs epoch in versioned dependecies
• BZ - 114436 - samba consumes all memory then hangs z390 vmachine.
• BZ - 116560 - Missing BuildRequires: krb5-devel
• BZ - 117181 - local variable used before set
• BZ - 119211 - smb.conf(5) manual page bug if you do not use UTF-8 based locale
• BZ - 121356 - spec file should install libsmbclient.so with executable permissions
• BZ - 122527 - Need 'printing = cups' and 'cups options = raw'
• BZ - 122749 - Samba is unable to read international characters in filenames
• BZ - 123271 - Users get error message when changing passwords after applying KB828741
• BZ - 125714 - NTBackup cannot access samba shares
• BZ - 126296 - Requesting updated packages to 3.0.4

CVEs

• CVE-2004-0686
• CVE-2004-0600

References

(none)