RHSA-2016:0466Medium

Red Hat Security Advisory: openssh security update

Published
March 21, 2016
Last Modified
November 5, 2026

🔗 CVE IDs covered (2)

CVE-2015-5600 →CVE-2016-3115 →

📋 Description

CVE-2015-5600 — openssh: MaxAuthTries limit bypass via duplicates in KbdInteractiveDevices CVE-2016-3115 — openssh: missing sanitisation of input for X11 forwarding

🎯 Affected products90

  • Red Hat Enterprise Linux Desktop (v. 6)
  • Red Hat Enterprise Linux Desktop Optional (v. 6)
  • Red Hat Enterprise Linux HPC Node (v. 6)
  • Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • Red Hat Enterprise Linux Server (v. 6)
  • Red Hat Enterprise Linux Server Optional (v. 6)
  • Red Hat Enterprise Linux Workstation (v. 6)
  • Red Hat Enterprise Linux Workstation Optional (v. 6)
  • openssh-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • openssh-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • openssh-0:5.3p1-114.el6_7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-0:5.3p1-114.el6_7.s390x as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-0:5.3p1-114.el6_7.src as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • openssh-0:5.3p1-114.el6_7.src as a component of Red Hat Enterprise Linux HPC Node (v. 6)
  • openssh-0:5.3p1-114.el6_7.src as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-0:5.3p1-114.el6_7.src as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • openssh-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • openssh-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux HPC Node (v. 6)
  • openssh-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.i686 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.ppc64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.s390x as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Desktop (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Server (v. 6)
  • openssh-askpass-0:5.3p1-114.el6_7.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)
  • +60 more not shown

✅ Remediation

Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 Workaround: This issue can be mitigated by disabling keyboard-interactive authentication method. That can be achieved by setting "ChallengeResponseAuthentication no" in the /etc/ssh/sshd_config configuration file and restarting the sshd service. Workaround: Set X11Forwarding=no in sshd_config. For authorized_keys that specify a "command" restriction, this issue can be mitigated by also setting the "no-X11-forwarding" restriction. In OpenSSH 7.2 and later, the "restrict" restriction can be used instead, which includes the "no-X11-forwarding" restriction.

🔗 References (5)