Red Hat Product Errata RHSA-2004:632 - Security Advisory
Issued:
2004-11-16
Updated:
2004-11-16

RHSA-2004:632 - Security Advisory

Synopsis

samba security update

Type/Severity

Security Advisory: Important

Topic

Updated samba packages that fix various security vulnerabilities are now
available.

Description

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

During a code audit, Stefan Esser discovered a buffer overflow in Samba
versions prior to 3.0.8 when handling unicode filenames. An authenticated
remote user could exploit this bug which may lead to arbitrary code
execution on the server. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0882 to this issue. Red Hat
believes that the Exec-Shield technology (enabled by default since Update
3) will block attempts to remotely exploit this vulnerability on x86
architectures.

Additionally, a bug was found in the input validation routines in versions
of Samba prior to 3.0.8 that caused the smbd process to consume abnormal
amounts of system memory. An authenticated remote user could exploit this
bug to cause a denial of service. The Common Vulnerabilities and Exposures
project (cve.mitre.org) has assigned the name CAN-2004-0930 to this issue.

Users of Samba should upgrade to these updated packages, which contain
backported security patches, and are not vulnerable to 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 Server 2 ia64
  • Red Hat Enterprise Linux Server 2 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 Workstation 2 ia64
  • Red Hat Enterprise Linux Workstation 2 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

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.