CVE-2020-12403
CRITICALNSS < 3.55 - Out-of-bounds Read in CHACHA20-POLY1305 Implementation
Title source: llmDescription
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.
References (4)
Core 4
Core References
Mailing List mailing-list
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1868931
Release Notes, Vendor Advisory
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
Vendor Advisory
https://security.netapp.com/advisory/ntap-20230324-0006/
Scores
CVSS v3
9.1
EPSS
0.0154
EPSS Percentile
71.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Details
CWE
CWE-125
Status
published
Products (1)
mozilla/nss
< 3.55
Published
May 27, 2021
Tracked Since
Feb 18, 2026