Operating System:

[RedHat]

Published:

02 December 2021

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2021.4082
                       Critical: nss security update
                              2 December 2021

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           nss
Publisher:         Red Hat
Operating System:  Red Hat
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account
                   Denial of Service               -- Existing Account
                   Reduced Security                -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-43527  

Reference:         ESB-2021.4065
                   ESB-2021.4064
                   ESB-2021.4063

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2021:4907

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Critical: nss security update
Advisory ID:       RHSA-2021:4907-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4907
Issue date:        2021-12-01
CVE Names:         CVE-2021-43527 
=====================================================================

1. Summary:

An update for nss is now available for Red Hat Enterprise Linux 6 Extended
Lifecycle Support.

Red Hat Product Security has rated this update as having a security impact
of Critical. 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 Server (v. 6 ELS) - i386, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6 ELS) - i386, s390x, x86_64

3. Description:

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.

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

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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux Server (v. 6 ELS):

Source:
nss-3.44.0-12.el6_10.src.rpm

i386:
nss-3.44.0-12.el6_10.i686.rpm
nss-debuginfo-3.44.0-12.el6_10.i686.rpm
nss-devel-3.44.0-12.el6_10.i686.rpm
nss-sysinit-3.44.0-12.el6_10.i686.rpm
nss-tools-3.44.0-12.el6_10.i686.rpm

s390x:
nss-3.44.0-12.el6_10.s390.rpm
nss-3.44.0-12.el6_10.s390x.rpm
nss-debuginfo-3.44.0-12.el6_10.s390.rpm
nss-debuginfo-3.44.0-12.el6_10.s390x.rpm
nss-devel-3.44.0-12.el6_10.s390.rpm
nss-devel-3.44.0-12.el6_10.s390x.rpm
nss-sysinit-3.44.0-12.el6_10.s390x.rpm
nss-tools-3.44.0-12.el6_10.s390x.rpm

x86_64:
nss-3.44.0-12.el6_10.i686.rpm
nss-3.44.0-12.el6_10.x86_64.rpm
nss-debuginfo-3.44.0-12.el6_10.i686.rpm
nss-debuginfo-3.44.0-12.el6_10.x86_64.rpm
nss-devel-3.44.0-12.el6_10.i686.rpm
nss-devel-3.44.0-12.el6_10.x86_64.rpm
nss-sysinit-3.44.0-12.el6_10.x86_64.rpm
nss-tools-3.44.0-12.el6_10.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6 ELS):

i386:
nss-debuginfo-3.44.0-12.el6_10.i686.rpm
nss-pkcs11-devel-3.44.0-12.el6_10.i686.rpm

s390x:
nss-debuginfo-3.44.0-12.el6_10.s390.rpm
nss-debuginfo-3.44.0-12.el6_10.s390x.rpm
nss-pkcs11-devel-3.44.0-12.el6_10.s390.rpm
nss-pkcs11-devel-3.44.0-12.el6_10.s390x.rpm

x86_64:
nss-debuginfo-3.44.0-12.el6_10.i686.rpm
nss-debuginfo-3.44.0-12.el6_10.x86_64.rpm
nss-pkcs11-devel-3.44.0-12.el6_10.i686.rpm
nss-pkcs11-devel-3.44.0-12.el6_10.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-2021-43527
https://access.redhat.com/security/updates/classification/#critical
https://access.redhat.com/security/vulnerabilities/RHSB-2021-008

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.
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