-------------------------------------------------------------------------Debian LTS Advisory DLA-3327-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                      Markus Koschany
February 20, 2023                             https://wiki.debian.org/LTS
-------------------------------------------------------------------------Package        : nss
Version        : 2:3.42.1-1+deb10u6
CVE ID         : CVE-2020-6829 CVE-2020-12400 CVE-2020-12401 CVE-2020-12403 
                 CVE-2023-0767

Multiple security vulnerabilities have been discovered in nss, the Network
Security Service libraries. 

CVE-2020-6829

    When performing EC scalar point multiplication, the wNAF point
    multiplication algorithm was used; which leaked partial information about
    the nonce used during signature generation. Given an electro-magnetic trace
    of a few signature generations, the private key could have been computed.

CVE-2020-12400

    When converting coordinates from projective to affine, the modular
    inversion was not performed in constant time, resulting in a possible
    timing-based side channel attack.

CVE-2020-12401

    During ECDSA signature generation, padding applied in the nonce designed to
    ensure constant-time scalar multiplication was removed, resulting in
    variable-time execution dependent on secret data.

CVE-2020-12403

    A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS.
    When using multi-part Chacha20, it could cause out-of-bounds reads.
    This issue was fixed by explicitly disabling multi-part ChaCha20 
    (which was not functioning correctly) and strictly enforcing tag length.

CVE-2023-0767

    Christian Holler discovered that incorrect handling of PKCS 12 Safe Bag
    attributes may result in execution of arbitrary code if a specially crafted
    PKCS 12 certificate bundle is processed.

For Debian 10 buster, these problems have been fixed in version
2:3.42.1-1+deb10u6.

We recommend that you upgrade your nss packages.

For the detailed security status of nss please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/nss

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

Debian LTS: DLA-3327-1: nss security update

February 20, 2023
Multiple security vulnerabilities have been discovered in nss, the Network Security Service libraries

Summary

When performing EC scalar point multiplication, the wNAF point
multiplication algorithm was used; which leaked partial information about
the nonce used during signature generation. Given an electro-magnetic trace
of a few signature generations, the private key could have been computed.

CVE-2020-12400

When converting coordinates from projective to affine, the modular
inversion was not performed in constant time, resulting in a possible
timing-based side channel attack.

CVE-2020-12401

During ECDSA signature generation, padding applied in the nonce designed to
ensure constant-time scalar multiplication was removed, resulting in
variable-time execution dependent on secret data.

CVE-2020-12403

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS.
When using multi-part Chacha20, it could cause out-of-bounds reads.
This issue was fixed by explicitly disabling multi-part ChaCha20 
(which was not functioning correctly) and strictly e...

Read the Full Advisory


Severity
-------------------------------------------------------------------------Package : nss
Version : 2:3.42.1-1+deb10u6
CVE ID : CVE-2020-6829 CVE-2020-12400 CVE-2020-12401 CVE-2020-12403

Related News

The End of the Road for Linux 6.11: A Call to Upgrade to Kernel 6.12
3 - 5 min read
The Linux kernel community recently issued an EOL announcement regarding the 6.11 kernel series, urging sysadmins to upgrade quickly to 6.12 . This
A Linux Admin
3 - 6 min read
As 2025 approaches, we Linux admins are facing new and often unseen cloud-native security obstacles. While skilled at mitigating known risks,
Leveraging Insights from the Linux Foundation
3 - 5 min read
The Linux Foundation's recent Census III report provides critical insights for Linux administrators, information security professionals, and anyone
Chrome 131 Released: Emergency Security Update Fixes Over a Dozen Significant Vulns
3 - 6 min read
Google recently unveiled a critical security update to their popular web browser, Google Chrome, addressing over a dozen significant security
From Wayland Fixes to Security Boosts: Examining Qt 6.8.1
3 - 6 min read
The recent Qt 6.8.1 release brings significant updates and improvements, strengthening its reputation as a secure and reliable application
Exploring Arch Linux 2024.12.01: Security Implications & Notable Enhancements for Linux Admins
3 - 6 min read
The Arch Linux 2024.12.01 ISO release marks an impressive milestone, offering cutting-edge updates that enhance functionality, streamline
Deck the Halls with Enhanced Security: Linux Kernel 6.13
3 - 5 min read
As Linux admins and infosec professionals prepare for the holiday season, there's much cause for celebration this year! Linus Torvalds recently made
Lessons from Bootkitty: Securing Linux Systems Against UEFI Intrusions
3 - 5 min read
New Linux security threats mark critical junctures that challenge existing policies and test security protocols to their limit. One such milestone

Get the Latest News & Insights

Sign up to get the latest security news affecting Linux and open source delivered straight to your inbox.

© 2024 Guardian Digital, Inc All Rights Reserved