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Red Hat Enterprise Linux 8 Update RHSA-2019-3702-01 Fixes for OpenSSH Bug

red hat
Calendar Grey November 5, 2019
Dist Redhat Esm H88
Critical Debian notice regarding OpenSSH tackles vulnerabilities and enhancements for commercial Linux distributions.
An update for openssh is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate

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.

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.
The following packages have been upgraded to a later upstream version: openssh (8.0p1). (BZ#1691045)
Security Fix(es):
* openssh: scp client improper directory name validation (CVE-2018-20685)
* openssh: Improper validation of object names allows malicious server to overwrite files via scp client (CVE-2019-6111)
* openssh: Missing character encoding in progress display allows for spoofing of scp client output (CVE-2019-6109)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, 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 8.1 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate red hat bug fix threat mitigation openssh ssh client

References

https://access.redhat.com/security/cve/CVE-2018-20685 https://access.redhat.com/security/cve/CVE-2019-6109 https://access.redhat.com/security/cve/CVE-2019-6111 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.1_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
aarch64: openssh-askpass-8.0p1-3.el8.aarch64.rpm openssh-askpass-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-cavs-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-clients-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-debugsource-8.0p1-3.el8.aarch64.rpm openssh-keycat-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-ldap-debuginfo-8.0p1-3.el8.aarch64.rpm openssh-server-debuginfo-8.0p1-3.el8.aarch64.rpm pam_ssh_agent_auth-debuginfo-0.10.3-7.3.el8.aarch64.rpm
ppc64le: openssh-askpass-8.0p1-3.el8.ppc64le.rpm openssh-askpass-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-cavs-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-clients-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-debugsource-8.0p1-3.el8.ppc64le.rpm openssh-keycat-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-ldap-debuginfo-8.0p1-3.el8.ppc64le.rpm openssh-server-debuginfo-8.0p1-3.el8.ppc64le.rpm pam_ssh_agent_auth-debuginfo-0.10.3-7.3.el8.ppc64le.rpm
s390x: openssh-askpass-8.0p1-3.el8.s390x.rpm openssh-askpass-debuginfo-8.0p1-3.el8.s390x.rpm openssh-cavs-debuginfo-8.0p1-3.el8.s390x.rpm openssh-clients-debuginfo-8.0p1-3.el8.s390x.rpm openssh-debuginfo-8.0p1-3.el8.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2019:3702-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2019:3702
Issue date: 2019-11-05

Topic

An update for openssh is now available for Red Hat Enterprise Linux 8.

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.

Topics%20covered

Topics Covered

security advisory moderate red hat bug fix threat mitigation openssh ssh client

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1665785 - CVE-2018-20685 openssh: scp client improper directory name validation

1666119 - CVE-2019-6109 openssh: Missing character encoding in progress display allows for spoofing of scp client output

1666127 - CVE-2019-6111 openssh: Improper validation of object names allows malicious server to overwrite files via scp client

1667519 - ssh-copy-id hangs when the remote system is out of space

1668325 - openssh - man pages do not mention crypto-policies

1683295 - Kerberos cleanup procedures do not work with GSSAPIDelegateCredentials and default ccache from krb5.conf

1685096 - In FIPS mode, during DH group exchange, OpenSSH client should validate the received moduli, making sure it is one of the known groups.

1686065 - SSH connections get closed when time-based rekeyring is used and ClientAliveMaxCount=0

1691045 - Rebase OpenSSH to latest release (8.0p1?)

1707485 - Use high-level API to do signatures

1712436 - MD5 is used when writing password protected PEM

1732424 - ssh-keygen -A fails in FIPS mode because of DSA key

1732449 - rsa-sha2-*-cert-v01@openssh.com host key types are ignored in FIPS despite being in the policy

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