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====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: openssh security update
Advisory ID:       RHSA-2023:2645-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:2645
Issue date:        2023-05-09
CVE Names:         CVE-2023-25136 
====================================================================
1. Summary:

An update for openssh is now available for Red Hat Enterprise Linux 9.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 9) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS (v. 9) - aarch64, ppc64le, s390x, x86_64

3. Description:

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: the functions order_hostkeyalgs() and list_hostkey_types() leads
to double-free vulnerability (CVE-2023-25136)

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.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

2167636 - CVE-2023-25136 openssh:  the functions order_hostkeyalgs() and list_hostkey_types() leads to double-free vulnerability

6. Package List:

Red Hat Enterprise Linux AppStream (v. 9):

aarch64:
openssh-askpass-8.7p1-29.el9_2.aarch64.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-debugsource-8.7p1-29.el9_2.aarch64.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.aarch64.rpm
pam_ssh_agent_auth-0.10.4-5.29.el9_2.aarch64.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.aarch64.rpm

ppc64le:
openssh-askpass-8.7p1-29.el9_2.ppc64le.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-debugsource-8.7p1-29.el9_2.ppc64le.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
pam_ssh_agent_auth-0.10.4-5.29.el9_2.ppc64le.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.ppc64le.rpm

s390x:
openssh-askpass-8.7p1-29.el9_2.s390x.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-debugsource-8.7p1-29.el9_2.s390x.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.s390x.rpm
pam_ssh_agent_auth-0.10.4-5.29.el9_2.s390x.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.s390x.rpm

x86_64:
openssh-askpass-8.7p1-29.el9_2.x86_64.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-debugsource-8.7p1-29.el9_2.x86_64.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.x86_64.rpm
pam_ssh_agent_auth-0.10.4-5.29.el9_2.x86_64.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.x86_64.rpm

Red Hat Enterprise Linux BaseOS (v. 9):

Source:
openssh-8.7p1-29.el9_2.src.rpm

aarch64:
openssh-8.7p1-29.el9_2.aarch64.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-clients-8.7p1-29.el9_2.aarch64.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-debugsource-8.7p1-29.el9_2.aarch64.rpm
openssh-keycat-8.7p1-29.el9_2.aarch64.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-server-8.7p1-29.el9_2.aarch64.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.aarch64.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.aarch64.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.aarch64.rpm

ppc64le:
openssh-8.7p1-29.el9_2.ppc64le.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-clients-8.7p1-29.el9_2.ppc64le.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-debugsource-8.7p1-29.el9_2.ppc64le.rpm
openssh-keycat-8.7p1-29.el9_2.ppc64le.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-server-8.7p1-29.el9_2.ppc64le.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.ppc64le.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.ppc64le.rpm

s390x:
openssh-8.7p1-29.el9_2.s390x.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-clients-8.7p1-29.el9_2.s390x.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-debugsource-8.7p1-29.el9_2.s390x.rpm
openssh-keycat-8.7p1-29.el9_2.s390x.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-server-8.7p1-29.el9_2.s390x.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.s390x.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.s390x.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.s390x.rpm

x86_64:
openssh-8.7p1-29.el9_2.x86_64.rpm
openssh-askpass-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-clients-8.7p1-29.el9_2.x86_64.rpm
openssh-clients-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-debugsource-8.7p1-29.el9_2.x86_64.rpm
openssh-keycat-8.7p1-29.el9_2.x86_64.rpm
openssh-keycat-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-server-8.7p1-29.el9_2.x86_64.rpm
openssh-server-debuginfo-8.7p1-29.el9_2.x86_64.rpm
openssh-sk-dummy-debuginfo-8.7p1-29.el9_2.x86_64.rpm
pam_ssh_agent_auth-debuginfo-0.10.4-5.29.el9_2.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/

7. References:

https://access.redhat.com/security/cve/CVE-2023-25136
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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