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AUSCERT External Security Bulletin Redistribution
ESB-2021.3801
linuxptp security, bug fix, and enhancement update
10 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: linuxptp
Publisher: Red Hat
Operating System: Red Hat
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3571
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:4321
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running linuxptp check for an updated version of the software for
their operating system.
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Red Hat Security Advisory
Synopsis: Moderate: linuxptp security, bug fix, and enhancement update
Advisory ID: RHSA-2021:4321-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4321
Issue date: 2021-11-09
CVE Names: CVE-2021-3571
=====================================================================
1. Summary:
An update for linuxptp is now available for Red Hat Enterprise Linux 8.
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. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
The linuxptp packages provide Precision Time Protocol (PTP) implementation
for Linux according to IEEE standard 1588 for Linux. The dual design goals
are to provide a robust implementation of the standard and to use the most
relevant and modern Application Programming Interfaces (API) offered by the
Linux kernel.
The following packages have been upgraded to a later upstream version:
linuxptp (3.1.1). (BZ#1895005)
Security Fix(es):
* linuxptp: wrong length of one-step follow-up in transparent clock
(CVE-2021-3571)
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
5. Bugs fixed (https://bugzilla.redhat.com/):
1895005 - Rebase linuxptp to 3.1
1966241 - CVE-2021-3571 linuxptp: wrong length of one-step follow-up in transparent clock
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
Source:
linuxptp-3.1.1-1.el8.src.rpm
aarch64:
linuxptp-3.1.1-1.el8.aarch64.rpm
linuxptp-debuginfo-3.1.1-1.el8.aarch64.rpm
linuxptp-debugsource-3.1.1-1.el8.aarch64.rpm
ppc64le:
linuxptp-3.1.1-1.el8.ppc64le.rpm
linuxptp-debuginfo-3.1.1-1.el8.ppc64le.rpm
linuxptp-debugsource-3.1.1-1.el8.ppc64le.rpm
s390x:
linuxptp-3.1.1-1.el8.s390x.rpm
linuxptp-debuginfo-3.1.1-1.el8.s390x.rpm
linuxptp-debugsource-3.1.1-1.el8.s390x.rpm
x86_64:
linuxptp-3.1.1-1.el8.x86_64.rpm
linuxptp-debuginfo-3.1.1-1.el8.x86_64.rpm
linuxptp-debugsource-3.1.1-1.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-2021-3571
https://access.redhat.com/security/updates/classification/#moderate
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@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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