RedHat: RHSA-2016-0466:01 Moderate: openssh security update
Summary
OpenSSH is OpenBSD's SSH (Secure Shell) protocol implementation.
These packages include the core files necessary for both the OpenSSH client
and server.
It was discovered that the OpenSSH server did not sanitize data received
in requests to enable X11 forwarding. An authenticated client with
restricted SSH access could possibly use this flaw to bypass intended
restrictions. (CVE-2016-3115)
It was discovered that the OpenSSH sshd daemon did not check the list of
keyboard-interactive authentication methods for duplicates. A remote
attacker could use this flaw to bypass the MaxAuthTries limit, making it
easier to perform password guessing attacks. (CVE-2015-5600)
All openssh users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing this
update, the OpenSSH server daemon (sshd) will be restarted automatically.
Summary
Solution
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
References
https://access.redhat.com/security/cve/CVE-2015-5600 https://access.redhat.com/security/cve/CVE-2016-3115 https://access.redhat.com/security/updates/classification/#moderate
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
openssh-5.3p1-114.el6_7.src.rpm
i386:
openssh-5.3p1-114.el6_7.i686.rpm
openssh-askpass-5.3p1-114.el6_7.i686.rpm
openssh-clients-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-server-5.3p1-114.el6_7.i686.rpm
x86_64:
openssh-5.3p1-114.el6_7.x86_64.rpm
openssh-askpass-5.3p1-114.el6_7.x86_64.rpm
openssh-clients-5.3p1-114.el6_7.x86_64.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-server-5.3p1-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-ldap-5.3p1-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
x86_64:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-ldap-5.3p1-114.el6_7.x86_64.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
openssh-5.3p1-114.el6_7.src.rpm
x86_64:
openssh-5.3p1-114.el6_7.x86_64.rpm
openssh-clients-5.3p1-114.el6_7.x86_64.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-server-5.3p1-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64:
openssh-askpass-5.3p1-114.el6_7.x86_64.rpm
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-ldap-5.3p1-114.el6_7.x86_64.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
openssh-5.3p1-114.el6_7.src.rpm
i386:
openssh-5.3p1-114.el6_7.i686.rpm
openssh-askpass-5.3p1-114.el6_7.i686.rpm
openssh-clients-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-server-5.3p1-114.el6_7.i686.rpm
ppc64:
openssh-5.3p1-114.el6_7.ppc64.rpm
openssh-askpass-5.3p1-114.el6_7.ppc64.rpm
openssh-clients-5.3p1-114.el6_7.ppc64.rpm
openssh-debuginfo-5.3p1-114.el6_7.ppc64.rpm
openssh-server-5.3p1-114.el6_7.ppc64.rpm
s390x:
openssh-5.3p1-114.el6_7.s390x.rpm
openssh-askpass-5.3p1-114.el6_7.s390x.rpm
openssh-clients-5.3p1-114.el6_7.s390x.rpm
openssh-debuginfo-5.3p1-114.el6_7.s390x.rpm
openssh-server-5.3p1-114.el6_7.s390x.rpm
x86_64:
openssh-5.3p1-114.el6_7.x86_64.rpm
openssh-askpass-5.3p1-114.el6_7.x86_64.rpm
openssh-clients-5.3p1-114.el6_7.x86_64.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-server-5.3p1-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
i386:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-ldap-5.3p1-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
ppc64:
openssh-debuginfo-5.3p1-114.el6_7.ppc.rpm
openssh-debuginfo-5.3p1-114.el6_7.ppc64.rpm
openssh-ldap-5.3p1-114.el6_7.ppc64.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.ppc.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.ppc64.rpm
s390x:
openssh-debuginfo-5.3p1-114.el6_7.s390.rpm
openssh-debuginfo-5.3p1-114.el6_7.s390x.rpm
openssh-ldap-5.3p1-114.el6_7.s390x.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.s390.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.s390x.rpm
x86_64:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-ldap-5.3p1-114.el6_7.x86_64.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
openssh-5.3p1-114.el6_7.src.rpm
i386:
openssh-5.3p1-114.el6_7.i686.rpm
openssh-askpass-5.3p1-114.el6_7.i686.rpm
openssh-clients-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-server-5.3p1-114.el6_7.i686.rpm
x86_64:
openssh-5.3p1-114.el6_7.x86_64.rpm
openssh-askpass-5.3p1-114.el6_7.x86_64.rpm
openssh-clients-5.3p1-114.el6_7.x86_64.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-server-5.3p1-114.el6_7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
i386:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-ldap-5.3p1-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
x86_64:
openssh-debuginfo-5.3p1-114.el6_7.i686.rpm
openssh-debuginfo-5.3p1-114.el6_7.x86_64.rpm
openssh-ldap-5.3p1-114.el6_7.x86_64.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.i686.rpm
pam_ssh_agent_auth-0.9.3-114.el6_7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/
Topic
Updated openssh packages that fix two security issues are now availablefor Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having Moderate securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64
Bugs Fixed
1245969 - CVE-2015-5600 openssh: MaxAuthTries limit bypass via duplicates in KbdInteractiveDevices
1316829 - CVE-2016-3115 openssh: missing sanitisation of input for X11 forwarding