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=====================================================================
Red Hat Security Advisory
Synopsis: Low: libssh security, bug fix, and enhancement update
Advisory ID: RHSA-2022:2031-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:2031
Issue date: 2022-05-10
CVE Names: CVE-2021-3634
=====================================================================
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.
The following packages have been upgraded to a later upstream version:
libssh (0.9.6). (BZ#1896651)
Security Fix(es):
* libssh: possible heap-based buffer overflow when rekeying (CVE-2021-3634)
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 8.6 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/):
1896651 - Update for libssh-0.9.0-4.el8.x86_64 as it has bug. Rebase to
libssh-0-9-6
1978810 - CVE-2021-3634 libssh: possible heap-based buffer overflow when
rekeying
2020159 - CI/gating - replace STI tests
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
aarch64:
libssh-debuginfo-0.9.6-3.el8.aarch64.rpm
libssh-debugsource-0.9.6-3.el8.aarch64.rpm
libssh-devel-0.9.6-3.el8.aarch64.rpm
ppc64le:
libssh-debuginfo-0.9.6-3.el8.ppc64le.rpm
libssh-debugsource-0.9.6-3.el8.ppc64le.rpm
libssh-devel-0.9.6-3.el8.ppc64le.rpm
s390x:
libssh-debuginfo-0.9.6-3.el8.s390x.rpm
libssh-debugsource-0.9.6-3.el8.s390x.rpm
libssh-devel-0.9.6-3.el8.s390x.rpm
x86_64:
libssh-debuginfo-0.9.6-3.el8.i686.rpm
libssh-debuginfo-0.9.6-3.el8.x86_64.rpm
libssh-debugsource-0.9.6-3.el8.i686.rpm
libssh-debugsource-0.9.6-3.el8.x86_64.rpm
libssh-devel-0.9.6-3.el8.i686.rpm
libssh-devel-0.9.6-3.el8.x86_64.rpm
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
libssh-0.9.6-3.el8.src.rpm
aarch64:
libssh-0.9.6-3.el8.aarch64.rpm
libssh-debuginfo-0.9.6-3.el8.aarch64.rpm
libssh-debugsource-0.9.6-3.el8.aarch64.rpm
noarch:
libssh-config-0.9.6-3.el8.noarch.rpm
ppc64le:
libssh-0.9.6-3.el8.ppc64le.rpm
libssh-debuginfo-0.9.6-3.el8.ppc64le.rpm
libssh-debugsource-0.9.6-3.el8.ppc64le.rpm
s390x:
libssh-0.9.6-3.el8.s390x.rpm
libssh-debuginfo-0.9.6-3.el8.s390x.rpm
libssh-debugsource-0.9.6-3.el8.s390x.rpm
x86_64:
libssh-0.9.6-3.el8.i686.rpm
libssh-0.9.6-3.el8.x86_64.rpm
libssh-debuginfo-0.9.6-3.el8.i686.rpm
libssh-debuginfo-0.9.6-3.el8.x86_64.rpm
libssh-debugsource-0.9.6-3.el8.i686.rpm
libssh-debugsource-0.9.6-3.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-2021-3634
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.6_release_notes/
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2022 Red Hat, Inc.
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