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Red Hat Enterprise Linux 8: RHSA-2021-4387 Low: libssh NULL Pointer Issue

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
Keep abreast of the new security patch for Red Hat's libssh, rated as minimal threat, and understand its potential effects.
An update for libssh is now available for Red Hat Enterprise Linux 8

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory security issue Red Hat Enterprise Linux low severity NULL pointer dereference libssh update sftp server

References

https://access.redhat.com/security/cve/CVE-2020-16135 https://access.redhat.com/security/updates/classification#low https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

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

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Low. 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 issue Red Hat Enterprise Linux low severity NULL pointer dereference libssh update sftp server

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

Bugs Fixed

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

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