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Red Hat 7: RHSA-2021-3798-01 Moderate Integer Overflow Security Threat

red hat
Calendar Grey October 12, 2021
Dist Redhat Esm H88
The new patches released by Red Hat for OpenSSL address several moderate security vulnerabilities, including problems related to integer overflow and dereferencing NULL pointers.
An update for openssl is now available for Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat update integer overflow security impact openssl NULL pointer dereference

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

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


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat update integer overflow security impact openssl NULL pointer dereference

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

Bugs Fixed

1930310 - CVE-2021-23841 openssl: NULL pointer dereference in X509_issuer_and_serial_hash()

1930324 - CVE-2021-23840 openssl: integer overflow in CipherUpdate

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