ID

VAR-202103-1464

CVE

CVE-2021-3449

TITLE

OpenSSL  In  NULL  Pointer dereference vulnerability

DESCRIPTION

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). The product supports a variety of encryption algorithms, including symmetric ciphers, hash algorithms, secure hash algorithms, etc. On March 25, 2021, the OpenSSL Project released a security advisory, OpenSSL Security Advisory [25 March 2021], that disclosed two vulnerabilities. Exploitation of these vulnerabilities could allow an malicious user to use a valid non-certificate authority (CA) certificate to act as a CA and sign a certificate for an arbitrary organization, user or device, or to cause a denial of service (DoS) condition. OpenSSL Security Advisory [25 March 2021] ========================================= CA certificate check bypass with X509_V_FLAG_X509_STRICT (CVE-2021-3450) ======================================================================== Severity: High The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. This issue was reported to OpenSSL on 18th March 2021 by Benjamin Kaduk from Akamai and was discovered by Xiang Ding and others at Akamai. The fix was developed by Tomáš Mráz. This issue was reported to OpenSSL on 17th March 2021 by Nokia. The fix was developed by Peter Kästle and Samuel Sapalski from Nokia. Note ==== OpenSSL 1.0.2 is out of support and no longer receiving public updates. Extended support is available for premium support customers: https://www.openssl.org/support/contracts.html OpenSSL 1.1.0 is out of support and no longer receiving updates of any kind. References ========== URL for this Security Advisory: https://www.openssl.org/news/secadv/20210325.txt Note: the online version of the advisory may be updated with additional details over time. For details of OpenSSL severity classifications please see: https://www.openssl.org/policies/secpolicy.html . Summary: Openshift Serverless 1.10.2 is now available. This version of the OpenShift Serverless Operator is supported on Red Hat OpenShift Container Platform version 4.5. Solution: See the documentation at: https://access.redhat.com/documentation/en-us/openshift_container_platform/ 4.5/html/serverless_applications/index 4. Description: Windows Container Support for Red Hat OpenShift allows you to deploy Windows container workloads running on Windows Server containers. Bug Fix(es): * WMCO patch pub-key-hash annotation to Linux node (BZ#1945248) * LoadBalancer Service type with invalid external loadbalancer IP breaks the datapath (BZ#1952917) * Telemetry info not completely available to identify windows nodes (BZ#1955319) * WMCO incorrectly shows node as ready after a failed configuration (BZ#1956412) * kube-proxy service terminated unexpectedly after recreated LB service (BZ#1963263) 3. Solution: For Windows Machine Config Operator upgrades, see the following documentation: https://docs.openshift.com/container-platform/4.7/windows_containers/window s-node-upgrades.html 4. Bugs fixed (https://bugzilla.redhat.com/): 1945248 - WMCO patch pub-key-hash annotation to Linux node 1946538 - CVE-2021-25736 kubernetes: LoadBalancer Service type don't create a HNS policy for empty or invalid external loadbalancer IP, what could lead to MITM 1952917 - LoadBalancer Service type with invalid external loadbalancer IP breaks the datapath 1955319 - Telemetry info not completely available to identify windows nodes 1956412 - WMCO incorrectly shows node as ready after a failed configuration 1963263 - kube-proxy service terminated unexpectedly after recreated LB service 5. Bug fix: * RHACM 2.0.10 images (BZ #1940452) 3. Bugs fixed (https://bugzilla.redhat.com/): 1940452 - RHACM 2.0.10 images 1944286 - CVE-2021-23358 nodejs-underscore: Arbitrary code execution via the template function 5. Relevant releases/architectures: Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - 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. 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. Package List: Red Hat Enterprise Linux BaseOS EUS (v. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. Summary: Red Hat Advanced Cluster Management for Kubernetes 2.1.6 General Availability release images, which fix several bugs and security issues. Description: Red Hat Advanced Cluster Management for Kubernetes 2.1.6 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console—with security policy built in. Bug fixes: * RHACM 2.1.6 images (BZ#1940581) * When generating the import cluster string, it can include unescaped characters (BZ#1934184) 3. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. Bugs fixed (https://bugzilla.redhat.com/): 1853652 - CVE-2020-14040 golang.org/x/text: possibility to trigger an infinite loop in encoding/unicode could lead to crash 1929338 - CVE-2020-35149 mquery: Code injection via merge or clone operation 1934184 - When generating the import cluster string, it can include unescaped characters 1940581 - RHACM 2.1.6 images 5. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP7 security update Advisory ID: RHSA-2021:1200-01 Product: Red Hat JBoss Core Services Advisory URL: https://access.redhat.com/errata/RHSA-2021:1200 Issue date: 2021-04-14 CVE Names: CVE-2021-3449 CVE-2021-3450 ==================================================================== 1. Summary: Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 7 zip release for RHEL 7, RHEL 8 and Microsoft Windows is available. Red Hat Product Security has rated this update as having a security impact of Important. 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. Description: Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release adds the new Apache HTTP Server 2.4.37 Service Pack 7 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 6 and includes bug fixes and enhancements. Refer to the Release Notes for information on the most significant bug fixes and enhancements included in this release. 3. Solution: Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link for the update. You must be logged in to download the update. 4. Bugs fixed (https://bugzilla.redhat.com/): 1941547 - CVE-2021-3450 openssl: CA certificate check bypass with X509_V_FLAG_X509_STRICT 1941554 - CVE-2021-3449 openssl: NULL pointer dereference in signature_algorithms processing 5. References: https://access.redhat.com/security/cve/CVE-2021-3449 https://access.redhat.com/security/cve/CVE-2021-3450 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=core.service.apachehttp&downloadType=securityPatches&version=2.4.37 6. 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYHcRztzjgjWX9erEAQi2UA//ZnBZbF6yu43LNZh8SpIsZt25+kmRXpPO 24bitxkguIp8Mbf6aysizioKh10TgUzJAZL/xwzVGaf1YTtGXEiiQZvl+qetQhal CYcQUX9iRTbN3LL5sT0es8qIc9pXnVSh9YCRaa2i3l9KWlPWA2U0R4OfrAmGIjUe VG3tJ92HhtdeEx0VOHC+X6e7bDMoGQboT7cDJsP/xn8abWrBn9pQYfh7Ej/4qwMK 8sm6M7KcMcl2Sxjv0PB5obmZWBILWiTwHrJu6M3D6HBMJ4IdA0+DrDjf5U3NW6xp uYmmkKkw18juBkRyLBFG0Xnm8JUh9t50zRL5XbI5rcv8w+puqcuLuNWD83L+fIFE Z7eDdVaf0TYljefjbiZP/An2vjiOJ6Tm7nO79lrCI/g7Oax+/oK0/ClDpLuwVKtB hz7f5VrK2+q+qDRvXk65Ala9kMHvhkr7s2/64/UMcvqpnTSkzypFORSdj+UBevUb a+2ClrFEeokOXZxvZGQQxvu6do8roy2vrpLgNmxaDf65JZk5R4NlC3J4SbEjwBTT Wg4bnZRXHi+T8OL3fmPTnNsEMOAdH3kwUfgzIbj9o6wFzoZiKYRUk9qQv8jb1G9K x0qnCqtrwqzBBUs+ntXfTguTOba7JYx7aWH6ieBOIb5tapLJw7xOlVWbE1d29BCy CkeZnyNSON8=u60F -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

code problem

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-10-20T01:13:44.810000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE