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Red Hat Enterprise Linux 7: RHSA-2021-4782 Moderate: OpenSSH Update

red hat
Calendar Grey November 23, 2021
Dist Redhat Esm H88
CentOS has issued a significant security patch for openssh in RHEL 7 to mitigate distinct vulnerabilities related to unauthorized privilege escalation.
An update for openssh is now available for Red Hat Enterprise Linux 7

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.
Security Fix(es):
* openssh: privilege escalation when AuthorizedKeysCommand or AuthorizedPrincipalsCommand are configured (CVE-2021-41617)
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.

Topics%20covered

Topics Covered

security advisory security update software patch privilege escalation Red Hat Enterprise Linux moderate severity openssh

References

https://access.redhat.com/security/cve/CVE-2021-41617 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: openssh-7.4p1-22.el7_9.src.rpm
x86_64: openssh-7.4p1-22.el7_9.x86_64.rpm openssh-askpass-7.4p1-22.el7_9.x86_64.rpm openssh-clients-7.4p1-22.el7_9.x86_64.rpm openssh-debuginfo-7.4p1-22.el7_9.x86_64.rpm openssh-keycat-7.4p1-22.el7_9.x86_64.rpm openssh-server-7.4p1-22.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: openssh-cavs-7.4p1-22.el7_9.x86_64.rpm openssh-debuginfo-7.4p1-22.el7_9.i686.rpm openssh-debuginfo-7.4p1-22.el7_9.x86_64.rpm openssh-ldap-7.4p1-22.el7_9.x86_64.rpm openssh-server-sysvinit-7.4p1-22.el7_9.x86_64.rpm pam_ssh_agent_auth-0.10.3-2.22.el7_9.i686.rpm pam_ssh_agent_auth-0.10.3-2.22.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: openssh-7.4p1-22.el7_9.src.rpm
x86_64: openssh-7.4p1-22.el7_9.x86_64.rpm openssh-clients-7.4p1-22.el7_9.x86_64.rpm openssh-debuginfo-7.4p1-22.el7_9.x86_64.rpm openssh-keycat-7.4p1-22.el7_9.x86_64.rpm openssh-server-7.4p1-22.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: openssh-askpass-7.4p1-22.el7_9.x86_64.rpm openssh-cavs-7.4p1-22.el7_9.x86_64.rpm openssh-debuginfo-7.4p1-22.el7_9.i686.rpm openssh-debuginfo-7.4p1-22.el7_9.x86_64.rpm openssh-ldap-7.4p1-22.el7_9.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:4782-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4782
Issue date: 2021-11-23

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 Moderate. 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.

Topics%20covered

Topics Covered

security advisory security update software patch privilege escalation Red Hat Enterprise Linux moderate severity openssh

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

Bugs Fixed

1999263 - frequent sshd segfaults

2008291 - CVE-2021-41617 openssh: privilege escalation when AuthorizedKeysCommand or AuthorizedPrincipalsCommand are configured

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