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VULNERABILITIES

CVE-2020-12403 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.1 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bugzilla.redhat.com/show_bug.cgi?id=1868931 CVEIssue TrackingPatchThird Party Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes CVERelease NotesVendor Advisory
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html CVE
https://security.netapp.com/advisory/ntap-20230324-0006/ CVE
https://bugzilla.redhat.com/show_bug.cgi?id=1868931 [email protected]Issue TrackingPatchThird Party Advisory

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-125Out-of-bounds Read[email protected]
CWE-125Out-of-bounds Read[email protected]

Affected Products

ProductVersions
mozilla nss
< 3.55

CPE

  • cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2020-12403
NVD Published Date:
May 27, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2020-12403 Details - Not Deferred