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CVE-2020-12403

Published: May 27, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-125
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
1.5%
Top 28.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-125

Affected Products

nssn/a
nssmozillaConsumer Software
mozillaoss-projectUSConsumer Softwareaka mozilla corp.

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
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References

https://bugzilla.redhat.com/show_bug.cgi?id=1868931
bugzilla.redhat.com
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
developer.mozilla.org
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
lists.debian.org
and 1 more references View all →

Timeline

Published
May 27, 2021
Last Updated
Nov 21, 2024

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