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Red Hat Enterprise Linux 7.6: RHSA-2021-0876-01 Moderate: NSS DoS Fix

red hat
Calendar Grey March 16, 2021
Dist Redhat Esm H88
A new patch has been released for nss and nss-softokn in Red Hat Enterprise Linux 7.6 to mitigate moderate vulnerabilities.
An update for nss and nss-softokn is now available for Red Hat Enterprise Linux 7.6 Extended 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.
The nss-softokn package provides the Network Security Services Softoken Cryptographic Module.
Security Fix(es):
* nss: Use-after-free in sftk_FreeSession due to improper refcounting (CVE-2019-11756)
* nss: Check length of inputs for cryptographic primitives (CVE-2019-17006)
* nss: Handling of Netscape Certificate Sequences in CERT_DecodeCertPackage() may crash with a NULL deref leading to DoS (CVE-2019-17007)
* 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.

Topics%20covered

Topics Covered

security advisory moderate Red Hat update DoS Red Hat Enterprise Linux cryptography impact nss nss-softokn

References

https://access.redhat.com/security/cve/CVE-2019-11756 https://access.redhat.com/security/cve/CVE-2019-17006 https://access.redhat.com/security/cve/CVE-2019-17007 https://access.redhat.com/security/cve/CVE-2020-12403 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: nss-3.36.0-9.el7_6.src.rpm nss-softokn-3.36.0-7.el7_6.src.rpm
x86_64: nss-3.36.0-9.el7_6.i686.rpm nss-3.36.0-9.el7_6.x86_64.rpm nss-debuginfo-3.36.0-9.el7_6.i686.rpm nss-debuginfo-3.36.0-9.el7_6.x86_64.rpm nss-softokn-3.36.0-7.el7_6.i686.rpm nss-softokn-3.36.0-7.el7_6.x86_64.rpm nss-softokn-debuginfo-3.36.0-7.el7_6.i686.rpm nss-softokn-debuginfo-3.36.0-7.el7_6.x86_64.rpm nss-softokn-freebl-3.36.0-7.el7_6.i686.rpm nss-softokn-freebl-3.36.0-7.el7_6.x86_64.rpm nss-sysinit-3.36.0-9.el7_6.x86_64.rpm nss-tools-3.36.0-9.el7_6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: nss-debuginfo-3.36.0-9.el7_6.i686.rpm nss-debuginfo-3.36.0-9.el7_6.x86_64.rpm nss-devel-3.36.0-9.el7_6.i686.rpm nss-devel-3.36.0-9.el7_6.x86_64.rpm nss-pkcs11-devel-3.36.0-9.el7_6.i686.rpm nss-pkcs11-devel-3.36.0-9.el7_6.x86_64.rpm nss-softokn-debuginfo-3.36.0-7.el7_6.i686.rpm nss-softokn-debuginfo-3.36.0-7.el7_6.x86_64.rpm nss-softokn-devel-3.36.0-7.el7_6.i686.rpm nss-softokn-devel-3.36.0-7.el7_6.x86_64.rpm nss-softokn-freebl-devel-3.36.0-7.el7_6.i686.rpm nss-softokn-freebl-devel-3.36.0-7.el7_6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.6):
Source: nss-3.36.0-9.el7_6.src.rpm nss-softokn-3.36.0-7.el7_6.src.rpm
ppc64:

Read the Full Advisory


Advisory ID: RHSA-2021:0876-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0876
Issue date: 2021-03-16

Topic

An update for nss and nss-softokn is now available for Red Hat EnterpriseLinux 7.6 Extended Update Support.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 update DoS Red Hat Enterprise Linux cryptography impact nss nss-softokn

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x

Bugs Fixed

1703979 - CVE-2019-17007 nss: Handling of Netscape Certificate Sequences in CERT_DecodeCertPackage() may crash with a NULL deref leading to DoS

1774835 - CVE-2019-11756 nss: Use-after-free in sftk_FreeSession due to improper refcounting

1775916 - CVE-2019-17006 nss: Check length of inputs for cryptographic primitives

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

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