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ZMCIRT Vulnerability Bulletin
ZMC-2021.04.28.1100
nss: Denial of service - Remote/unauthenticated
28th April 2021
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Product: nss
Publisher: Red Hat
Operating System: Red Hat
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-25648
Original Bulletin:
https://access.redhat.com/errata/RHSA-2021:1384
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running nss check for an updated version of the software for their
operating system.
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Hash: SHA256
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Red Hat Security Advisory
Synopsis: Moderate: nss security and bug fix update
Advisory ID: RHSA-2021:1384-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1384
Issue date: 2021-04-27
CVE Names: CVE-2020-25648
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1. Summary:
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 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:
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: TLS 1.3 CCS flood remote DoS Attack (CVE-2020-25648)
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.
Bug Fix(es):
* FTBFS: Paypal Cert expired (BZ#1883973)
* FTBFS: IKE CLASS_1563 fails gtest (BZ#1884793)
* Cannot compile code with nss headers and -Werror=strict-prototypes
(BZ#1885321)
* CA HSM ncipher token disabled after RHEL-7.9 update (BZ#1932193)
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/):
1883973 - FTBFS: Paypal Cert expired [rhel-7.9.z]
1884793 - FTBFS: IKE CLASS_1563 fails gtest [rhel-7.9.z]
1885321 - Cannot compile code with nss headers and -Werror=strict-prototypes
1887319 - CVE-2020-25648 nss: TLS 1.3 CCS flood remote DoS Attack
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
nss-3.53.1-7.el7_9.src.rpm
x86_64:
nss-3.53.1-7.el7_9.i686.rpm
nss-3.53.1-7.el7_9.x86_64.rpm
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-sysinit-3.53.1-7.el7_9.x86_64.rpm
nss-tools-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-devel-3.53.1-7.el7_9.i686.rpm
nss-devel-3.53.1-7.el7_9.x86_64.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.i686.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
nss-3.53.1-7.el7_9.src.rpm
x86_64:
nss-3.53.1-7.el7_9.i686.rpm
nss-3.53.1-7.el7_9.x86_64.rpm
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-sysinit-3.53.1-7.el7_9.x86_64.rpm
nss-tools-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-devel-3.53.1-7.el7_9.i686.rpm
nss-devel-3.53.1-7.el7_9.x86_64.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.i686.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
nss-3.53.1-7.el7_9.src.rpm
ppc64:
nss-3.53.1-7.el7_9.ppc.rpm
nss-3.53.1-7.el7_9.ppc64.rpm
nss-debuginfo-3.53.1-7.el7_9.ppc.rpm
nss-debuginfo-3.53.1-7.el7_9.ppc64.rpm
nss-devel-3.53.1-7.el7_9.ppc.rpm
nss-devel-3.53.1-7.el7_9.ppc64.rpm
nss-sysinit-3.53.1-7.el7_9.ppc64.rpm
nss-tools-3.53.1-7.el7_9.ppc64.rpm
ppc64le:
nss-3.53.1-7.el7_9.ppc64le.rpm
nss-debuginfo-3.53.1-7.el7_9.ppc64le.rpm
nss-devel-3.53.1-7.el7_9.ppc64le.rpm
nss-sysinit-3.53.1-7.el7_9.ppc64le.rpm
nss-tools-3.53.1-7.el7_9.ppc64le.rpm
s390x:
nss-3.53.1-7.el7_9.s390.rpm
nss-3.53.1-7.el7_9.s390x.rpm
nss-debuginfo-3.53.1-7.el7_9.s390.rpm
nss-debuginfo-3.53.1-7.el7_9.s390x.rpm
nss-devel-3.53.1-7.el7_9.s390.rpm
nss-devel-3.53.1-7.el7_9.s390x.rpm
nss-sysinit-3.53.1-7.el7_9.s390x.rpm
nss-tools-3.53.1-7.el7_9.s390x.rpm
x86_64:
nss-3.53.1-7.el7_9.i686.rpm
nss-3.53.1-7.el7_9.x86_64.rpm
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-devel-3.53.1-7.el7_9.i686.rpm
nss-devel-3.53.1-7.el7_9.x86_64.rpm
nss-sysinit-3.53.1-7.el7_9.x86_64.rpm
nss-tools-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
ppc64:
nss-debuginfo-3.53.1-7.el7_9.ppc.rpm
nss-debuginfo-3.53.1-7.el7_9.ppc64.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.ppc.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.ppc64.rpm
ppc64le:
nss-debuginfo-3.53.1-7.el7_9.ppc64le.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.ppc64le.rpm
s390x:
nss-debuginfo-3.53.1-7.el7_9.s390.rpm
nss-debuginfo-3.53.1-7.el7_9.s390x.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.s390.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.s390x.rpm
x86_64:
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.i686.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
nss-3.53.1-7.el7_9.src.rpm
x86_64:
nss-3.53.1-7.el7_9.i686.rpm
nss-3.53.1-7.el7_9.x86_64.rpm
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-devel-3.53.1-7.el7_9.i686.rpm
nss-devel-3.53.1-7.el7_9.x86_64.rpm
nss-sysinit-3.53.1-7.el7_9.x86_64.rpm
nss-tools-3.53.1-7.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64:
nss-debuginfo-3.53.1-7.el7_9.i686.rpm
nss-debuginfo-3.53.1-7.el7_9.x86_64.rpm
nss-pkcs11-devel-3.53.1-7.el7_9.i686.rpm
nss-pkcs11-devel-3.53.1-7.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-2020-25648
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
ZMCIRT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. ZMCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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