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Red Hat 8 RHSA-2021:0538-01 Moderate: NSS Side Channel Attack

red hat
Calendar Grey February 16, 2021
Dist Redhat Esm H88
This notice pertains to a significant security enhancement for NSS in Red Hat Enterprise Linux, alongside addressing bugs and potential vulnerabilities.
An update for nss is now available for Red Hat Enterprise Linux 8

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: Side channel attack on ECDSA signature generation (CVE-2020-6829)
* nss: P-384 and P-521 implementation uses a side-channel vulnerable modular inversion function (CVE-2020-12400)
* nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read (CVE-2020-12403)
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):
* Support key wrap/unwrap with RSA-OAEP (BZ#1896431)
* 1536bit group from RFC3526 is allowed in FIPS mode when in policy DH-MIN is set to be lower than 1536 (BZ#1896432)
* when NSS_SDB_USE_CACHE not set, after curl access https, dentry increase but never released - consider alternative algorithm for benchmarking ACCESS call in sdb_measureAccess [rhel-8] (BZ#1896933)
* Policy should allow overriding library defaults (BZ#1898702)
* KDF-self-tests-induced changes for nss in RHEL 8.4 (BZ#1898953)
* nss: non-blocksize requests to IKEv1 KDF returns bogus output (BZ#1904408)

Topics%20covered

Topics Covered

security advisory moderate Red Hat red hat bug fix attack NSS nss side channel

References

https://access.redhat.com/security/cve/CVE-2020-6829 https://access.redhat.com/security/cve/CVE-2020-12400 https://access.redhat.com/security/cve/CVE-2020-12403 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: nss-3.53.1-17.el8_3.src.rpm
aarch64: nss-3.53.1-17.el8_3.aarch64.rpm nss-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-debugsource-3.53.1-17.el8_3.aarch64.rpm nss-devel-3.53.1-17.el8_3.aarch64.rpm nss-softokn-3.53.1-17.el8_3.aarch64.rpm nss-softokn-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-softokn-devel-3.53.1-17.el8_3.aarch64.rpm nss-softokn-freebl-3.53.1-17.el8_3.aarch64.rpm nss-softokn-freebl-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-softokn-freebl-devel-3.53.1-17.el8_3.aarch64.rpm nss-sysinit-3.53.1-17.el8_3.aarch64.rpm nss-sysinit-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-tools-3.53.1-17.el8_3.aarch64.rpm nss-tools-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-util-3.53.1-17.el8_3.aarch64.rpm nss-util-debuginfo-3.53.1-17.el8_3.aarch64.rpm nss-util-devel-3.53.1-17.el8_3.aarch64.rpm
ppc64le: nss-3.53.1-17.el8_3.ppc64le.rpm nss-debuginfo-3.53.1-17.el8_3.ppc64le.rpm nss-debugsource-3.53.1-17.el8_3.ppc64le.rpm nss-devel-3.53.1-17.el8_3.ppc64le.rpm nss-softokn-3.53.1-17.el8_3.ppc64le.rpm nss-softokn-debuginfo-3.53.1-17.el8_3.ppc64le.rpm nss-softokn-devel-3.53.1-17.el8_3.ppc64le.rpm nss-softokn-freebl-3.53.1-17.el8_3.ppc64le.rpm nss-softokn-freebl-debuginfo-3.53.1-17.el8_3.ppc64le.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:0538-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0538
Issue date: 2021-02-16

Topic

An update for nss is now available for Red Hat Enterprise Linux 8.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 moderate Red Hat red hat bug fix attack NSS nss side channel

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1826187 - CVE-2020-6829 nss: Side channel attack on ECDSA signature generation

1853983 - CVE-2020-12400 nss: P-384 and P-521 implementation uses a side-channel vulnerable modular inversion function

1868931 - CVE-2020-12403 nss: CHACHA20-POLY1305 decryption with undersized tag leads to out-of-bounds read

1896431 - Support key wrap/unwrap with RSA-OAEP [rhel-8.3.0.z]

1896432 - 1536bit group from RFC3526 is allowed in FIPS mode when in policy DH-MIN is set to be lower than 1536 [rhel-8.3.0.z]

1896933 - when NSS_SDB_USE_CACHE not set, after curl access https, dentry increase but never released - consider alternative algorithm for benchmarking ACCESS call in sdb_measureAccess [rhel-8] [rhel-8.3.0.z]

1898953 - KDF-self-tests-induced changes for nss in RHEL 8.4 [rhel-8.3.0.z]

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