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Out-of-bounds Read Affecting nss package, versions <2:3.42.1-1+deb10u6

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Availability High

    Threat Intelligence

    EPSS 0.24% (62nd percentile)
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NVD
9.1 critical
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SUSE
9.1 critical
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Red Hat
7.4 high

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  • Snyk ID SNYK-DEBIAN10-NSS-608060
  • published 21 Aug 2020
  • disclosed 27 May 2021
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Introduced: 21 Aug 2020

CVE-2020-12403 Open this link in a new tab
CWE-125 Open this link in a new tab

How to fix?

Upgrade Debian:10 nss to version 2:3.42.1-1+deb10u6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nss package and not the nss package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. 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. The highest threat from this vulnerability is to confidentiality and system availability.