openssh security update

CentOS Errata and Security Advisory CESA-2006:0298

OpenSSH is OpenBSD’s SSH (Secure SHell) protocol implementation. This
package includes the core files necessary for both the OpenSSH client and
server.

An arbitrary command execution flaw was discovered in the way scp copies
files locally. It is possible for a local attacker to create a file with a
carefully crafted name that could execute arbitrary commands as the user
running scp to copy files locally. (CVE-2006-0225)

The SSH daemon, when restricting host access by numeric IP addresses and
with VerifyReverseMapping disabled, allows remote attackers to bypass
“from=” and “user@host” address restrictions by connecting to a host from a
system whose reverse DNS hostname contains the numeric IP address.
(CVE-2003-0386)

The following issues have also been fixed in this update:

• If the sshd service was stopped using the sshd init script while the
  main sshd daemon was not running, the init script would kill other sshd
  processes, such as the running sessions. For example, this could happen
  when the ‘service sshd stop’ command was issued twice.

• When privilege separation was enabled, the last login message was printed
  only for the root user.

• The sshd daemon was sending messages to the system log from a signal
  handler when debug logging was enabled. This could cause a deadlock of
  the user’s connection.

All users of openssh should upgrade to these updated packages, which
resolve these issues.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2006-August/075255.html
https://lists.centos.org/pipermail/centos-announce/2006-August/075256.html
https://lists.centos.org/pipermail/centos-announce/2006-July/075212.html
https://lists.centos.org/pipermail/centos-announce/2006-July/075214.html

Affected packages:
openssh
openssh-askpass
openssh-askpass-gnome
openssh-clients
openssh-server

Upstream details at:
https://access.redhat.com/errata/RHSA-2006:0298