NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
77.0.1+build1-0ubuntu0.16.04.12:3.28.4-0ubuntu0.16.04.111:68.10.0+build1-0ubuntu0.16.04.177.0.1+build1-0ubuntu0.18.04.12:3.35-2ubuntu2.81:68.10.0+build1-0ubuntu0.18.04.177.0.1+build1-0ubuntu0.20.04.12:3.49.1-1ubuntu1.11:68.10.0+build1-0ubuntu0.20.04.12:3.28.4-0ubuntu0.14.04.5+esm5Exploitability
AV:LAC:HPR:LUI:RScope
S:UImpact
C:HI:NA:NCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N