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Red Hat Enterprise 7: RHSA-2021-4904-05 Critical: NSS Memory Issue

red hat
Calendar Grey December 1, 2021
Dist Redhat Esm H88
To bolster security amid recent NSS updates, organizations using Red Hat must follow essential guidelines for library updates, code assessment, and more.
An update for nss 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

After installing this update, applications using NSS (for example, Firefox) must be restarted for this update to take effect.

Summary

Network Security Services (NSS) is a set of libraries designed to support the cross-platform development of security-enabled client and server applications.
Security Fix(es):
* nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS) (CVE-2021-43527)
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 critical memory corruption application security Red Hat Enterprise network security services NSS update

References

https://access.redhat.com/security/cve/CVE-2021-43527 https://access.redhat.com/security/vulnerabilities/RHSB-2021-008 https://access.redhat.com/security/updates/classification/#critical

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: nss-3.67.0-4.el7_9.src.rpm
x86_64: nss-3.67.0-4.el7_9.i686.rpm nss-3.67.0-4.el7_9.x86_64.rpm nss-debuginfo-3.67.0-4.el7_9.i686.rpm nss-debuginfo-3.67.0-4.el7_9.x86_64.rpm nss-sysinit-3.67.0-4.el7_9.x86_64.rpm nss-tools-3.67.0-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: nss-debuginfo-3.67.0-4.el7_9.i686.rpm nss-debuginfo-3.67.0-4.el7_9.x86_64.rpm nss-devel-3.67.0-4.el7_9.i686.rpm nss-devel-3.67.0-4.el7_9.x86_64.rpm nss-pkcs11-devel-3.67.0-4.el7_9.i686.rpm nss-pkcs11-devel-3.67.0-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: nss-3.67.0-4.el7_9.src.rpm
x86_64: nss-3.67.0-4.el7_9.i686.rpm nss-3.67.0-4.el7_9.x86_64.rpm nss-debuginfo-3.67.0-4.el7_9.i686.rpm nss-debuginfo-3.67.0-4.el7_9.x86_64.rpm nss-sysinit-3.67.0-4.el7_9.x86_64.rpm nss-tools-3.67.0-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: nss-debuginfo-3.67.0-4.el7_9.i686.rpm nss-debuginfo-3.67.0-4.el7_9.x86_64.rpm nss-devel-3.67.0-4.el7_9.i686.rpm nss-devel-3.67.0-4.el7_9.x86_64.rpm nss-pkcs11-devel-3.67.0-4.el7_9.i686.rpm nss-pkcs11-devel-3.67.0-4.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: nss-3.67.0-4.el7_9.src.rpm
ppc64: nss-3.67.0-4.el7_9.ppc.rpm

Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4904-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4904
Issue date: 2021-12-01

Topic

An update for nss is now available for Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Critical. 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 critical memory corruption application security Red Hat Enterprise network security services NSS update

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

2024370 - CVE-2021-43527 nss: Memory corruption in decodeECorDsaSignature with DSA signatures (and RSA-PSS)

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