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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 . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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