| Name | CVE-2020-6829 |
| Description | When 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2388-1, DLA-3327-1, ELA-256-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| firefox (PTS) | sid | 133.0.3-1 | fixed |
| nss (PTS) | jessie, jessie (lts) | 2:3.26-1+debu8u19 | fixed |
| stretch (security) | 2:3.26.2-1.1+deb9u5 | fixed | |
| stretch (lts), stretch | 2:3.26.2-1.1+deb9u8 | fixed | |
| buster, buster (lts) | 2:3.42.1-1+deb10u9 | fixed | |
| buster (security) | 2:3.42.1-1+deb10u8 | fixed | |
| bullseye | 2:3.61-1+deb11u3 | fixed | |
| bullseye (security) | 2:3.61-1+deb11u4 | fixed | |
| bookworm | 2:3.87.1-1 | fixed | |
| bookworm (security) | 2:3.87.1-1+deb12u1 | fixed | |
| sid, trixie | 2:3.106-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| firefox | source | (unstable) | 80.0-1 | |||
| nss | source | jessie | 2:3.26-1+debu8u12 | ELA-256-1 | ||
| nss | source | stretch | 2:3.26.2-1.1+deb9u2 | DLA-2388-1 | ||
| nss | source | buster | 2:3.42.1-1+deb10u6 | DLA-3327-1 | ||
| nss | source | (unstable) | 2:3.55-1 |
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