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AUSCERT External Security Bulletin Redistribution
edk2 security, bug fix, and enhancement update
10 November 2021
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Denial of Service -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2021-23841 CVE-2021-23840
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Red Hat Security Advisory
Synopsis: Moderate: edk2 security, bug fix, and enhancement update
Advisory ID: RHSA-2021:4198-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4198
Issue date: 2021-11-09
CVE Names: CVE-2021-23840 CVE-2021-23841
An update for edk2 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) - noarch
EDK (Embedded Development Kit) is a project to enable UEFI support for
Virtual Machines. This package contains a sample 64-bit UEFI firmware for
QEMU and KVM.
The following packages have been upgraded to a later upstream version: edk2
(20210527gite1999b264f1f). (BZ#1846481, BZ#1938238)
* openssl: integer overflow in CipherUpdate (CVE-2021-23840)
* openssl: NULL pointer dereference in X509_issuer_and_serial_hash()
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.
For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.5 Release Notes linked from the References section.
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
5. Bugs fixed (https://bugzilla.redhat.com/):
1930310 - CVE-2021-23841 openssl: NULL pointer dereference in X509_issuer_and_serial_hash()
1930324 - CVE-2021-23840 openssl: integer overflow in CipherUpdate
1937564 - [RFE] support VCPU hot unplug in OVMF/edk2
1938238 - rebase edk2 to edk2-stable202105 for RHEL-8.5
1938257 - refresh OpenSSL bundled with edk2 for RHEL-8.5
1956837 - Additional build of edk2 without SMM (dual build / sub-package) for SEV-ES
1988762 - edk2 does not ignore PMBR protective record BootIndicator as required by UEFI spec
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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