CVE-2020-12403

NameCVE-2020-12403
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2388-1
NVD severitymedium

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nss (PTS)stretch2:3.26.2-1.1+deb9u1vulnerable
stretch (security)2:3.26.2-1.1+deb9u2fixed
buster, buster (security)2:3.42.1-1+deb10u3vulnerable
bullseye2:3.61-1fixed
bookworm, sid2:3.70-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
nsssourcestretch2:3.26.2-1.1+deb9u2DLA-2388-1
nsssource(unstable)2:3.55-1

Notes

[buster] - nss <no-dsa> (Minor issue)
https://hg.mozilla.org/projects/nss/rev/f282556e6cc7715f5754aeaadda6f902590e7e38
https://hg.mozilla.org/projects/nss/rev/c25adfdfab34ddb08d3262aac3242e3399de1095
https://bugzilla.mozilla.org/show_bug.cgi?id=1636771
https://bugzilla.redhat.com/show_bug.cgi?id=1868931

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