CVE-2020-12403

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
mozillaCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 41%
VendorProductVersion
mozillanss
𝑥
< 3.55
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
nss
bullseye
2:3.61-1+deb11u3
fixed
bullseye (security)
2:3.61-1+deb11u4
fixed
bookworm
2:3.87.1-1
fixed
sid
2:3.105-2
fixed
trixie
2:3.105-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
nss
focal
Fixed 2:3.49.1-1ubuntu1.5
released
bionic
Fixed 2:3.35-2ubuntu2.12
released
xenial
Fixed 2:3.28.4-0ubuntu0.16.04.14
released
trusty
Fixed 2:3.28.4-0ubuntu0.14.04.5+esm8
released
Common Weakness Enumeration
References
https://bugzilla.redhat.com/show_bug.cgi?id=1868931
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
https://security.netapp.com/advisory/ntap-20230324-0006/
https://bugzilla.redhat.com/show_bug.cgi?id=1868931
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
https://security.netapp.com/advisory/ntap-20230324-0006/