ID

VAR-202102-1488

CVE

CVE-2021-23841

TITLE

OpenSSL  In  NULL  Pointer dereference vulnerability

DESCRIPTION

The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x). There is no information about this vulnerability at present. Please keep an eye on CNNVD or manufacturer announcements. Bugs fixed (https://bugzilla.redhat.com/): 1944888 - CVE-2021-21409 netty: Request smuggling via content-length header 2004133 - CVE-2021-37136 netty-codec: Bzip2Decoder doesn't allow setting size restrictions for decompressed data 2004135 - CVE-2021-37137 netty-codec: SnappyFrameDecoder doesn't restrict chunk length and may buffer skippable chunks in an unnecessary way 2030932 - CVE-2021-44228 log4j-core: Remote code execution in Log4j 2.x when logs contain an attacker-controlled string value 5. JIRA issues fixed (https://issues.jboss.org/): LOG-1971 - Applying cluster state is causing elasticsearch to hit an issue and become unusable 6. 8) - noarch 3. Description: 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). 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. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: openssl security update Advisory ID: RHSA-2021:3798-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:3798 Issue date: 2021-10-12 CVE Names: CVE-2021-23840 CVE-2021-23841 ===================================================================== 1. Summary: An update for openssl is now available for Red Hat Enterprise Linux 7. 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 Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - 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. 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/): 1930310 - CVE-2021-23841 openssl: NULL pointer dereference in X509_issuer_and_serial_hash() 1930324 - CVE-2021-23840 openssl: integer overflow in CipherUpdate 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: openssl-1.0.2k-22.el7_9.src.rpm x86_64: openssl-1.0.2k-22.el7_9.x86_64.rpm openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-libs-1.0.2k-22.el7_9.i686.rpm openssl-libs-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-devel-1.0.2k-22.el7_9.i686.rpm openssl-devel-1.0.2k-22.el7_9.x86_64.rpm openssl-perl-1.0.2k-22.el7_9.x86_64.rpm openssl-static-1.0.2k-22.el7_9.i686.rpm openssl-static-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: openssl-1.0.2k-22.el7_9.src.rpm x86_64: openssl-1.0.2k-22.el7_9.x86_64.rpm openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-libs-1.0.2k-22.el7_9.i686.rpm openssl-libs-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-devel-1.0.2k-22.el7_9.i686.rpm openssl-devel-1.0.2k-22.el7_9.x86_64.rpm openssl-perl-1.0.2k-22.el7_9.x86_64.rpm openssl-static-1.0.2k-22.el7_9.i686.rpm openssl-static-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: openssl-1.0.2k-22.el7_9.src.rpm ppc64: openssl-1.0.2k-22.el7_9.ppc64.rpm openssl-debuginfo-1.0.2k-22.el7_9.ppc.rpm openssl-debuginfo-1.0.2k-22.el7_9.ppc64.rpm openssl-devel-1.0.2k-22.el7_9.ppc.rpm openssl-devel-1.0.2k-22.el7_9.ppc64.rpm openssl-libs-1.0.2k-22.el7_9.ppc.rpm openssl-libs-1.0.2k-22.el7_9.ppc64.rpm ppc64le: openssl-1.0.2k-22.el7_9.ppc64le.rpm openssl-debuginfo-1.0.2k-22.el7_9.ppc64le.rpm openssl-devel-1.0.2k-22.el7_9.ppc64le.rpm openssl-libs-1.0.2k-22.el7_9.ppc64le.rpm s390x: openssl-1.0.2k-22.el7_9.s390x.rpm openssl-debuginfo-1.0.2k-22.el7_9.s390.rpm openssl-debuginfo-1.0.2k-22.el7_9.s390x.rpm openssl-devel-1.0.2k-22.el7_9.s390.rpm openssl-devel-1.0.2k-22.el7_9.s390x.rpm openssl-libs-1.0.2k-22.el7_9.s390.rpm openssl-libs-1.0.2k-22.el7_9.s390x.rpm x86_64: openssl-1.0.2k-22.el7_9.x86_64.rpm openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-devel-1.0.2k-22.el7_9.i686.rpm openssl-devel-1.0.2k-22.el7_9.x86_64.rpm openssl-libs-1.0.2k-22.el7_9.i686.rpm openssl-libs-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: openssl-debuginfo-1.0.2k-22.el7_9.ppc.rpm openssl-debuginfo-1.0.2k-22.el7_9.ppc64.rpm openssl-perl-1.0.2k-22.el7_9.ppc64.rpm openssl-static-1.0.2k-22.el7_9.ppc.rpm openssl-static-1.0.2k-22.el7_9.ppc64.rpm ppc64le: openssl-debuginfo-1.0.2k-22.el7_9.ppc64le.rpm openssl-perl-1.0.2k-22.el7_9.ppc64le.rpm openssl-static-1.0.2k-22.el7_9.ppc64le.rpm s390x: openssl-debuginfo-1.0.2k-22.el7_9.s390.rpm openssl-debuginfo-1.0.2k-22.el7_9.s390x.rpm openssl-perl-1.0.2k-22.el7_9.s390x.rpm openssl-static-1.0.2k-22.el7_9.s390.rpm openssl-static-1.0.2k-22.el7_9.s390x.rpm x86_64: openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-perl-1.0.2k-22.el7_9.x86_64.rpm openssl-static-1.0.2k-22.el7_9.i686.rpm openssl-static-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: openssl-1.0.2k-22.el7_9.src.rpm x86_64: openssl-1.0.2k-22.el7_9.x86_64.rpm openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-devel-1.0.2k-22.el7_9.i686.rpm openssl-devel-1.0.2k-22.el7_9.x86_64.rpm openssl-libs-1.0.2k-22.el7_9.i686.rpm openssl-libs-1.0.2k-22.el7_9.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: openssl-debuginfo-1.0.2k-22.el7_9.i686.rpm openssl-debuginfo-1.0.2k-22.el7_9.x86_64.rpm openssl-perl-1.0.2k-22.el7_9.x86_64.rpm openssl-static-1.0.2k-22.el7_9.i686.rpm openssl-static-1.0.2k-22.el7_9.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 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYWWqjtzjgjWX9erEAQj4lg/+IFxqmMQqLSvyz8cKUAPgss/+/wFMpRgh ZZxYBQQ0cBFfWFlROVLaRdeiGcZYkyJCRDqy2Yb8YO1A4PnSOc+htLFYmSmU2kcm QLHinOzGEZo/44vN7Qsl4WhJkJIdlysCwKpkkOCUprMEnhlWMvja2eSSG9JLH16d RqGe4AsJQLKSKLgmhejCOqxb9am+t9zBW0zaZHP4UR52Ju1rG5rLjBJ85Gcrmp2B vp/GVEQ/Asid4MZA2WTx+s6wj5Dt7JOdLWrUbcYAC0I8oPWbAoZJTfPkM7S6Xv+U 68iruVFTh74IkCbQ+SNLoYjiDAVJqtAVRVBha7Fd3/gWR6aJLLaqluLRGvd0mwXY pohCS0ynuMQ9wtYOJ3ezSVcBN+/d9Hs/3s8RWQTzrNG6jtBe57H9/tNkeSVFSVvu PMKXsUoOrIUE2HCflJytDB9wkQmsWxiZoH/xVlrtD0D11egZ4EWjJL6x+xtCTAkT u67CAwsCKxxCeNmz42uBtXSwFXoUapJnsviGzAx247T2pyuXlYMYHlsOy7CtBvIk jEEosCMM72UyXO4XsYTXc0jM3ze6iQTcF9irwhy+X+rTB4IXBubdUEoT0jnKlwfI BQvoPEBlcG+f0VU8BL+FCOosvM0ZqC7KGGOwJLoG1Vqz8rbtmhpcmNAOvzUiHdm3 T4OjSl1NzQQ= =Taj2 -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://listman.redhat.com/mailman/listinfo/rhsa-announce . Description: Red Hat Advanced Cluster Management for Kubernetes 2.2.10 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. See the following Release Notes documentation, which will be updated shortly for this release, for additional details about this release: https://access.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.2/html/release_notes/ Security fixes: * CVE-2021-3795 semver-regex: inefficient regular expression complexity * CVE-2021-23440 nodejs-set-value: type confusion allows bypass of CVE-2019-10747 Related bugs: * RHACM 2.2.10 images (Bugzilla #2013652) 3. Bugs fixed (https://bugzilla.redhat.com/): 2004944 - CVE-2021-23440 nodejs-set-value: type confusion allows bypass of CVE-2019-10747 2006009 - CVE-2021-3795 semver-regex: inefficient regular expression complexity 2013652 - RHACM 2.2.10 images 5. ========================================================================== Ubuntu Security Notice USN-4745-1 February 23, 2021 openssl vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: Several security issues were fixed in OpenSSL. (CVE-2021-23841) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: libssl1.0.0 1.0.1f-1ubuntu2.27+esm2 Ubuntu 12.04 ESM: libssl1.0.0 1.0.1-4ubuntu5.45 After a standard system update you need to reboot your computer to make all the necessary changes. Bugs fixed (https://bugzilla.redhat.com/): 1963232 - CVE-2021-33194 golang: x/net/html: infinite loop in ParseFragment 5. JIRA issues fixed (https://issues.jboss.org/): LOG-1168 - Disable hostname verification in syslog TLS settings LOG-1235 - Using HTTPS without a secret does not translate into the correct 'scheme' value in Fluentd LOG-1375 - ssl_ca_cert should be optional LOG-1378 - CLO should support sasl_plaintext(Password over http) LOG-1392 - In fluentd config, flush_interval can't be set with flush_mode=immediate LOG-1494 - Syslog output is serializing json incorrectly LOG-1555 - Fluentd logs emit transaction failed: error_class=NoMethodError while forwarding to external syslog server LOG-1575 - Rejected by Elasticsearch and unexpected json-parsing LOG-1735 - Regression introducing flush_at_shutdown LOG-1774 - The collector logs should be excluded in fluent.conf LOG-1776 - fluentd total_limit_size sets value beyond available space LOG-1822 - OpenShift Alerting Rules Style-Guide Compliance LOG-1859 - CLO Should not error and exit early on missing ca-bundle when cluster wide proxy is not enabled LOG-1862 - Unsupported kafka parameters when enabled Kafka SASL LOG-1903 - Fix the Display of ClusterLogging type in OLM LOG-1911 - CLF API changes to Opt-in to multiline error detection LOG-1918 - Alert `FluentdNodeDown` always firing LOG-1939 - Opt-in multiline detection breaks cloudwatch forwarding 6. Bugs fixed (https://bugzilla.redhat.com/): 1948761 - CVE-2021-23369 nodejs-handlebars: Remote code execution when compiling untrusted compile templates with strict:true option 1956688 - CVE-2021-23383 nodejs-handlebars: Remote code execution when compiling untrusted compile templates with compat:true option 5. Description: This release adds the new Apache HTTP Server 2.4.37 Service Pack 10 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Apache HTTP Server 2.4.37 Service Pack 9 and includes bug fixes and enhancements. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

code problem

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Red Hat

SOURCES

LAST UPDATE DATE

2025-12-22T22:38:54.865000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE