Issued:
2017-08-31
Updated:
2017-08-31

RHSA-2017:2563 - Moderate: openssh security update

Synopsis

Moderate: openssh security update

Type/Severity

Security Advisory Moderate

Topic

An update for openssh is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

  • A covert timing channel flaw was found in the way OpenSSH handled authentication of non-existent users. A remote unauthenticated attacker could possibly use this flaw to determine valid user names by measuring the timing of server responses. (CVE-2016-6210)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • openssh-ldap-5.3p1-123.el6_9.i686.rpm
  • openssh-ldap-5.3p1-123.el6_9.s390x.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.i686.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.i686.rpm
  • openssh-5.3p1-123.el6_9.s390x.rpm
  • openssh-askpass-5.3p1-123.el6_9.ppc64.rpm
  • openssh-5.3p1-123.el6_9.x86_64.rpm
  • openssh-5.3p1-123.el6_9.src.rpm
  • openssh-askpass-5.3p1-123.el6_9.s390x.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.ppc.rpm
  • openssh-5.3p1-123.el6_9.i686.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.ppc64.rpm
  • openssh-askpass-5.3p1-123.el6_9.x86_64.rpm
  • openssh-ldap-5.3p1-123.el6_9.ppc64.rpm
  • openssh-clients-5.3p1-123.el6_9.ppc64.rpm
  • openssh-5.3p1-123.el6_9.ppc64.rpm
  • openssh-clients-5.3p1-123.el6_9.i686.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.s390x.rpm
  • openssh-server-5.3p1-123.el6_9.x86_64.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.ppc64.rpm
  • openssh-server-5.3p1-123.el6_9.i686.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.s390.rpm
  • openssh-clients-5.3p1-123.el6_9.x86_64.rpm
  • openssh-askpass-5.3p1-123.el6_9.i686.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.s390x.rpm
  • openssh-clients-5.3p1-123.el6_9.s390x.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.s390.rpm
  • openssh-ldap-5.3p1-123.el6_9.x86_64.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.x86_64.rpm
  • openssh-debuginfo-5.3p1-123.el6_9.x86_64.rpm
  • openssh-server-5.3p1-123.el6_9.ppc64.rpm
  • pam_ssh_agent_auth-0.9.3-123.el6_9.ppc.rpm
  • openssh-server-5.3p1-123.el6_9.s390x.rpm

Fixes

CVEs

References

Additional information