samba security update

CentOS Errata and Security Advisory CESA-2008:0290

Samba is a suite of programs used by machines to share files, printers, and
other information.

A heap-based buffer overflow flaw was found in the way Samba clients handle
over-sized packets. If a client connected to a malicious Samba server, it
was possible to execute arbitrary code as the Samba client user. It was
also possible for a remote user to send a specially crafted print request
to a Samba server that could result in the server executing the vulnerable
client code, resulting in arbitrary code execution with the permissions of
the Samba server. (CVE-2008-1105)

Red Hat would like to thank Alin Rad Pop of Secunia Research for
responsibly disclosing this issue.

This update also addresses two issues which prevented Samba from joining
certain Windows domains with tightened security policies, and prevented
certain signed SMB content from working as expected:

• when some Windows® 2000-based domain controllers were set to use
  mandatory signing, Samba clients would drop the connection because of an
  error when generating signatures. This presented as a “Server packet had
  invalid SMB signature” error to the Samba client. This update corrects the
  signature generation error.

• Samba servers using the “net ads join” command to connect to a Windows
  Server® 2003-based domain would fail with “failed to get schannel session
  key from server” and “NT_STATUS_ACCESS_DENIED” errors. This update
  correctly binds to the NETLOGON share, allowing Samba servers to connect to
  the domain properly.

Users of Samba are advised to upgrade to these updated packages, which
contain a backported patch to resolve these issues.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2008-June/077200.html
https://lists.centos.org/pipermail/centos-announce/2008-June/077201.html

Affected packages:
samba
samba-client
samba-common
samba-swat

Upstream details at:
https://access.redhat.com/errata/RHSA-2008:0290