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.
777768.968.9Exploitability
AV:LAC:HPR:LUI:RScope
S:UImpact
C:HI:NA:N4.4/CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N