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AUSCERT External Security Bulletin Redistribution
ESB-2021.3756
openssl security and bug fix update
10 November 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: openssl
Publisher: Red Hat
Operating System: Red Hat
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-23841 CVE-2021-23840
Reference: ESB-2021.3499
ESB-2021.1015
ESB-2021.0992
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:4424
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Red Hat Security Advisory
Synopsis: Moderate: openssl security and bug fix update
Advisory ID: RHSA-2021:4424-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4424
Issue date: 2021-11-09
CVE Names: CVE-2021-23840 CVE-2021-23841
=====================================================================
1. Summary:
An update for openssl 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 BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and
Transport Layer Security (TLS) protocols, as well as a full-strength
general-purpose cryptography library.
Security Fix(es):
* openssl: integer overflow in CipherUpdate (CVE-2021-23840)
* openssl: NULL pointer dereference in X509_issuer_and_serial_hash()
(CVE-2021-23841)
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
For the update to take effect, all services linked to the OpenSSL library
must be restarted, or the system rebooted.
5. Bugs fixed (https://bugzilla.redhat.com/):
1908036 - openssl listens on IPv4 "any" socket only not on IPv6
1930310 - CVE-2021-23841 openssl: NULL pointer dereference in X509_issuer_and_serial_hash()
1930324 - CVE-2021-23840 openssl: integer overflow in CipherUpdate
1934534 - Rebase OpenSSL to 1.1.1k
1934600 - DTLS1.0 connections are allowed in DEFAULT crypto-policy [rhel-8]
1939637 - Openssl -dtls option breaks in FIPS mode[rhel8]
1940085 - FIPS_selftest() fails in FIPS mode.
1965362 - In renegotiated handshake openssl sends extensions which client didn't advertise in second ClientHello [rhel-8]
6. Package List:
Red Hat Enterprise Linux BaseOS (v. 8):
Source:
openssl-1.1.1k-4.el8.src.rpm
aarch64:
openssl-1.1.1k-4.el8.aarch64.rpm
openssl-debuginfo-1.1.1k-4.el8.aarch64.rpm
openssl-debugsource-1.1.1k-4.el8.aarch64.rpm
openssl-devel-1.1.1k-4.el8.aarch64.rpm
openssl-libs-1.1.1k-4.el8.aarch64.rpm
openssl-libs-debuginfo-1.1.1k-4.el8.aarch64.rpm
openssl-perl-1.1.1k-4.el8.aarch64.rpm
ppc64le:
openssl-1.1.1k-4.el8.ppc64le.rpm
openssl-debuginfo-1.1.1k-4.el8.ppc64le.rpm
openssl-debugsource-1.1.1k-4.el8.ppc64le.rpm
openssl-devel-1.1.1k-4.el8.ppc64le.rpm
openssl-libs-1.1.1k-4.el8.ppc64le.rpm
openssl-libs-debuginfo-1.1.1k-4.el8.ppc64le.rpm
openssl-perl-1.1.1k-4.el8.ppc64le.rpm
s390x:
openssl-1.1.1k-4.el8.s390x.rpm
openssl-debuginfo-1.1.1k-4.el8.s390x.rpm
openssl-debugsource-1.1.1k-4.el8.s390x.rpm
openssl-devel-1.1.1k-4.el8.s390x.rpm
openssl-libs-1.1.1k-4.el8.s390x.rpm
openssl-libs-debuginfo-1.1.1k-4.el8.s390x.rpm
openssl-perl-1.1.1k-4.el8.s390x.rpm
x86_64:
openssl-1.1.1k-4.el8.x86_64.rpm
openssl-debuginfo-1.1.1k-4.el8.i686.rpm
openssl-debuginfo-1.1.1k-4.el8.x86_64.rpm
openssl-debugsource-1.1.1k-4.el8.i686.rpm
openssl-debugsource-1.1.1k-4.el8.x86_64.rpm
openssl-devel-1.1.1k-4.el8.i686.rpm
openssl-devel-1.1.1k-4.el8.x86_64.rpm
openssl-libs-1.1.1k-4.el8.i686.rpm
openssl-libs-1.1.1k-4.el8.x86_64.rpm
openssl-libs-debuginfo-1.1.1k-4.el8.i686.rpm
openssl-libs-debuginfo-1.1.1k-4.el8.x86_64.rpm
openssl-perl-1.1.1k-4.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-2021-23840
https://access.redhat.com/security/cve/CVE-2021-23841
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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