CVE-2020-12400

NameCVE-2020-12400
DescriptionWhen converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
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 severitylow

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid82.0-1fixed
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
bullseye, sid2:3.58-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)80.0-1
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/e55ab3145546ae3cf1333b43956a974675d2d25c
https://hg.mozilla.org/projects/nss/rev/3f022d5eca5d3cd0e366a825a5681953d76299d0
https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.55_release_notes
Issue relates to CVE-2020-6829 and resolved in the same commits.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-36/#CVE-2020-12400

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