RedHat: RHSA-2018-0980:01 Low: openssh security, bug fix,
Summary
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):
* openssh: Improper write operations in readonly mode allow for zero-length
file creation (CVE-2017-15906)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.5 Release Notes linked from the References section.
Summary
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.
References
https://access.redhat.com/security/cve/CVE-2017-15906 https://access.redhat.com/security/updates/classification/#low https://access.redhat.com/documentation/en-US/red_hat_enterprise_linux/7/html/7.5_release_notes/index.html
Package List
Red Hat Enterprise Linux Client (v. 7):
Source:
openssh-7.4p1-16.el7.src.rpm
x86_64:
openssh-7.4p1-16.el7.x86_64.rpm
openssh-askpass-7.4p1-16.el7.x86_64.rpm
openssh-clients-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-keycat-7.4p1-16.el7.x86_64.rpm
openssh-server-7.4p1-16.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
openssh-cavs-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.i686.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-ldap-7.4p1-16.el7.x86_64.rpm
openssh-server-sysvinit-7.4p1-16.el7.x86_64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.i686.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
openssh-7.4p1-16.el7.src.rpm
x86_64:
openssh-7.4p1-16.el7.x86_64.rpm
openssh-clients-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-keycat-7.4p1-16.el7.x86_64.rpm
openssh-server-7.4p1-16.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
openssh-askpass-7.4p1-16.el7.x86_64.rpm
openssh-cavs-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.i686.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-ldap-7.4p1-16.el7.x86_64.rpm
openssh-server-sysvinit-7.4p1-16.el7.x86_64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.i686.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
openssh-7.4p1-16.el7.src.rpm
ppc64:
openssh-7.4p1-16.el7.ppc64.rpm
openssh-askpass-7.4p1-16.el7.ppc64.rpm
openssh-clients-7.4p1-16.el7.ppc64.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64.rpm
openssh-keycat-7.4p1-16.el7.ppc64.rpm
openssh-server-7.4p1-16.el7.ppc64.rpm
ppc64le:
openssh-7.4p1-16.el7.ppc64le.rpm
openssh-askpass-7.4p1-16.el7.ppc64le.rpm
openssh-clients-7.4p1-16.el7.ppc64le.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64le.rpm
openssh-keycat-7.4p1-16.el7.ppc64le.rpm
openssh-server-7.4p1-16.el7.ppc64le.rpm
s390x:
openssh-7.4p1-16.el7.s390x.rpm
openssh-askpass-7.4p1-16.el7.s390x.rpm
openssh-clients-7.4p1-16.el7.s390x.rpm
openssh-debuginfo-7.4p1-16.el7.s390x.rpm
openssh-keycat-7.4p1-16.el7.s390x.rpm
openssh-server-7.4p1-16.el7.s390x.rpm
x86_64:
openssh-7.4p1-16.el7.x86_64.rpm
openssh-askpass-7.4p1-16.el7.x86_64.rpm
openssh-clients-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-keycat-7.4p1-16.el7.x86_64.rpm
openssh-server-7.4p1-16.el7.x86_64.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source:
openssh-7.4p1-16.el7.src.rpm
aarch64:
openssh-7.4p1-16.el7.aarch64.rpm
openssh-askpass-7.4p1-16.el7.aarch64.rpm
openssh-clients-7.4p1-16.el7.aarch64.rpm
openssh-debuginfo-7.4p1-16.el7.aarch64.rpm
openssh-keycat-7.4p1-16.el7.aarch64.rpm
openssh-server-7.4p1-16.el7.aarch64.rpm
ppc64le:
openssh-7.4p1-16.el7.ppc64le.rpm
openssh-askpass-7.4p1-16.el7.ppc64le.rpm
openssh-clients-7.4p1-16.el7.ppc64le.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64le.rpm
openssh-keycat-7.4p1-16.el7.ppc64le.rpm
openssh-server-7.4p1-16.el7.ppc64le.rpm
s390x:
openssh-7.4p1-16.el7.s390x.rpm
openssh-askpass-7.4p1-16.el7.s390x.rpm
openssh-clients-7.4p1-16.el7.s390x.rpm
openssh-debuginfo-7.4p1-16.el7.s390x.rpm
openssh-keycat-7.4p1-16.el7.s390x.rpm
openssh-server-7.4p1-16.el7.s390x.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7):
aarch64:
openssh-cavs-7.4p1-16.el7.aarch64.rpm
openssh-debuginfo-7.4p1-16.el7.aarch64.rpm
openssh-ldap-7.4p1-16.el7.aarch64.rpm
openssh-server-sysvinit-7.4p1-16.el7.aarch64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.aarch64.rpm
ppc64le:
openssh-cavs-7.4p1-16.el7.ppc64le.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64le.rpm
openssh-ldap-7.4p1-16.el7.ppc64le.rpm
openssh-server-sysvinit-7.4p1-16.el7.ppc64le.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.ppc64le.rpm
s390x:
openssh-cavs-7.4p1-16.el7.s390x.rpm
openssh-debuginfo-7.4p1-16.el7.s390.rpm
openssh-debuginfo-7.4p1-16.el7.s390x.rpm
openssh-ldap-7.4p1-16.el7.s390x.rpm
openssh-server-sysvinit-7.4p1-16.el7.s390x.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.s390.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.s390x.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64:
openssh-cavs-7.4p1-16.el7.ppc64.rpm
openssh-debuginfo-7.4p1-16.el7.ppc.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64.rpm
openssh-ldap-7.4p1-16.el7.ppc64.rpm
openssh-server-sysvinit-7.4p1-16.el7.ppc64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.ppc.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.ppc64.rpm
ppc64le:
openssh-cavs-7.4p1-16.el7.ppc64le.rpm
openssh-debuginfo-7.4p1-16.el7.ppc64le.rpm
openssh-ldap-7.4p1-16.el7.ppc64le.rpm
openssh-server-sysvinit-7.4p1-16.el7.ppc64le.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.ppc64le.rpm
s390x:
openssh-cavs-7.4p1-16.el7.s390x.rpm
openssh-debuginfo-7.4p1-16.el7.s390.rpm
openssh-debuginfo-7.4p1-16.el7.s390x.rpm
openssh-ldap-7.4p1-16.el7.s390x.rpm
openssh-server-sysvinit-7.4p1-16.el7.s390x.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.s390.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.s390x.rpm
x86_64:
openssh-cavs-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.i686.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-ldap-7.4p1-16.el7.x86_64.rpm
openssh-server-sysvinit-7.4p1-16.el7.x86_64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.i686.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
openssh-7.4p1-16.el7.src.rpm
x86_64:
openssh-7.4p1-16.el7.x86_64.rpm
openssh-askpass-7.4p1-16.el7.x86_64.rpm
openssh-clients-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-keycat-7.4p1-16.el7.x86_64.rpm
openssh-server-7.4p1-16.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
openssh-cavs-7.4p1-16.el7.x86_64.rpm
openssh-debuginfo-7.4p1-16.el7.i686.rpm
openssh-debuginfo-7.4p1-16.el7.x86_64.rpm
openssh-ldap-7.4p1-16.el7.x86_64.rpm
openssh-server-sysvinit-7.4p1-16.el7.x86_64.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.i686.rpm
pam_ssh_agent_auth-0.10.3-2.16.el7.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
An update for openssh is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x
Bugs Fixed
1456853 - ssh -Q and -G list host key types that are not allowed in FIPS mode
1478175 - The UseDNS configuration option changed default behaviour between 7.3 and 7.4, this breaks existing configurations until manually corrected
1480510 - SSH connections get closed when time-based rekeyring is used and ClientAliveMaxCount=0
1488083 - segfaults when cleaning up session due to some error
1488982 - GSSAPIStrictAcceptorCheck default change with 7.4
1494268 - pam_ssh_agent_auth SEGV's if keyfile is missing
1496467 - Regression: SSH AuthorizedKeysCommand hangs when output is too large
1496808 - OpenSSH 7.4 doesn't work with WinSCP >= 5.10 clients
1506630 - CVE-2017-15906 openssh: Improper write operations in readonly mode allow for zero-length file creation