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Red Hat 7.4: RHSA-2021-4932-01 Critical NSS Memory Concern

red hat
Calendar Grey December 6, 2021
Dist Redhat Esm H88
Important nss security advisory for Red Hat Enterprise Linux 7.4 contains remedies and insights regarding memory vulnerabilities.
An update for nss is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support

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 issue security fix Red Hat Enterprise Linux memory issue nss update

References

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

Package List

Red Hat Enterprise Linux Server AUS (v. 7.4):
Source: nss-3.28.4-18.el7_4.src.rpm
x86_64: nss-3.28.4-18.el7_4.i686.rpm nss-3.28.4-18.el7_4.x86_64.rpm nss-debuginfo-3.28.4-18.el7_4.i686.rpm nss-debuginfo-3.28.4-18.el7_4.x86_64.rpm nss-devel-3.28.4-18.el7_4.i686.rpm nss-devel-3.28.4-18.el7_4.x86_64.rpm nss-sysinit-3.28.4-18.el7_4.x86_64.rpm nss-tools-3.28.4-18.el7_4.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 7.4):
x86_64: nss-debuginfo-3.28.4-18.el7_4.i686.rpm nss-debuginfo-3.28.4-18.el7_4.x86_64.rpm nss-pkcs11-devel-3.28.4-18.el7_4.i686.rpm nss-pkcs11-devel-3.28.4-18.el7_4.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


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:4932-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4932
Issue date: 2021-12-06

Topic

An update for nss is now available for Red Hat Enterprise Linux 7.4Advanced Update Support.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 issue security fix Red Hat Enterprise Linux memory issue nss update

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 7.4) - x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64

Bugs Fixed

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

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