[RHSA-2021:4387-04] Low: libssh security update

[Security announcements for all Red Hat products and services.]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

Synopsis:          Low: libssh security update
Advisory ID:       RHSA-2021:4387-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4387
Issue date:        2021-11-09
CVE Names:         CVE-2020-16135 
=====================================================================

1. Summary:

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

Red Hat Product Security has rated this update as having a security impact
of Low. 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. 8) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

3. Description:

libssh is a library which implements the SSH protocol. It can be used to
implement client and server applications.

Security Fix(es):

* libssh: NULL pointer dereference in sftpserver.c if ssh_buffer_new
returns NULL (CVE-2020-16135)

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 8.5 Release Notes linked from 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 these updated packages, all running applications using
libssh must be restarted for this update to take effect.

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

1862456 - CVE-2020-16135 libssh: NULL pointer dereference in sftpserver.c if ssh_buffer_new returns NULL

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

aarch64:
libssh-debuginfo-0.9.4-3.el8.aarch64.rpm
libssh-debugsource-0.9.4-3.el8.aarch64.rpm
libssh-devel-0.9.4-3.el8.aarch64.rpm

ppc64le:
libssh-debuginfo-0.9.4-3.el8.ppc64le.rpm
libssh-debugsource-0.9.4-3.el8.ppc64le.rpm
libssh-devel-0.9.4-3.el8.ppc64le.rpm

s390x:
libssh-debuginfo-0.9.4-3.el8.s390x.rpm
libssh-debugsource-0.9.4-3.el8.s390x.rpm
libssh-devel-0.9.4-3.el8.s390x.rpm

x86_64:
libssh-debuginfo-0.9.4-3.el8.i686.rpm
libssh-debuginfo-0.9.4-3.el8.x86_64.rpm
libssh-debugsource-0.9.4-3.el8.i686.rpm
libssh-debugsource-0.9.4-3.el8.x86_64.rpm
libssh-devel-0.9.4-3.el8.i686.rpm
libssh-devel-0.9.4-3.el8.x86_64.rpm

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
libssh-0.9.4-3.el8.src.rpm

aarch64:
libssh-0.9.4-3.el8.aarch64.rpm
libssh-debuginfo-0.9.4-3.el8.aarch64.rpm
libssh-debugsource-0.9.4-3.el8.aarch64.rpm

noarch:
libssh-config-0.9.4-3.el8.noarch.rpm

ppc64le:
libssh-0.9.4-3.el8.ppc64le.rpm
libssh-debuginfo-0.9.4-3.el8.ppc64le.rpm
libssh-debugsource-0.9.4-3.el8.ppc64le.rpm

s390x:
libssh-0.9.4-3.el8.s390x.rpm
libssh-debuginfo-0.9.4-3.el8.s390x.rpm
libssh-debugsource-0.9.4-3.el8.s390x.rpm

x86_64:
libssh-0.9.4-3.el8.i686.rpm
libssh-0.9.4-3.el8.x86_64.rpm
libssh-debuginfo-0.9.4-3.el8.i686.rpm
libssh-debuginfo-0.9.4-3.el8.x86_64.rpm
libssh-debugsource-0.9.4-3.el8.i686.rpm
libssh-debugsource-0.9.4-3.el8.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-2020-16135
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/

8. Contact:

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

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=7sSo
-----END PGP SIGNATURE-----