CVE-2020-6829

NameCVE-2020-6829
DescriptionWhen performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-2388-1, DLA-3327-1, ELA-256-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid133.0-1fixed
nss (PTS)jessie, jessie (lts)2:3.26-1+debu8u19fixed
stretch (security)2:3.26.2-1.1+deb9u5fixed
stretch (lts), stretch2:3.26.2-1.1+deb9u8fixed
buster, buster (lts)2:3.42.1-1+deb10u9fixed
buster (security)2:3.42.1-1+deb10u8fixed
bullseye2:3.61-1+deb11u3fixed
bullseye (security)2:3.61-1+deb11u4fixed
bookworm2:3.87.1-1fixed
bookworm (security)2:3.87.1-1+deb12u1fixed
sid, trixie2:3.106-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)80.0-1
nsssourcejessie2:3.26-1+debu8u12ELA-256-1
nsssourcestretch2:3.26.2-1.1+deb9u2DLA-2388-1
nsssourcebuster2:3.42.1-1+deb10u6DLA-3327-1
nsssource(unstable)2:3.55-1

Notes

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-2020-12400 and resolved in the same commits.
https://www.mozilla.org/en-US/security/advisories/mfsa2020-36/#CVE-2020-6829

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