CVE-2020-12399
Firefox ESR: NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually…
CVE-2020-12399 is fixed in 24 products on 2 platforms, first by libnss3 2:3.35-2ubuntu2.8, released May 25, 2020. It is not reported as exploited. Patch Radar priority: Routine.
RoutineFixed on 2 platforms
CVSS
4.4
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0065
51st percentile
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 78.0esr | Mozilla Firefox ESR (en-US) 78.0esr | Jun 25, 2020 |
| Linux | |||
| firefox · Ubuntu 18.04.6 LTS (bionic) | 77.0.1+build1-0ubuntu0.18.04.1 | firefox 77.0.1+build1-0ubuntu0.18.04.1 | Jun 2, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 77.0.1+build1-0ubuntu0.20.04.1 | firefox 77.0.1+build1-0ubuntu0.20.04.1 | Jun 2, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 77.0.1+build1-0ubuntu0.18.04.1 | firefox-geckodriver 77.0.1+build1-0ubuntu0.18.04.1 | Jun 2, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 77.0.1+build1-0ubuntu0.20.04.1 | firefox-geckodriver 77.0.1+build1-0ubuntu0.20.04.1 | Jun 2, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 77.0.1+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 77.0.1+build1-0ubuntu0.18.04.1 | Jun 2, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 77.0.1+build1-0ubuntu0.20.04.1 | firefox-mozsymbols 77.0.1+build1-0ubuntu0.20.04.1 | Jun 2, 2020 |
| libnss3 · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.8 | libnss3 2:3.35-2ubuntu2.8 | May 25, 2020 |
| libnss3 · Ubuntu 20.04 LTS (focal) | 2:3.49.1-1ubuntu1.1 | libnss3 2:3.49.1-1ubuntu1.1 | May 25, 2020 |
| libnss3-tools · Ubuntu 18.04.6 LTS (bionic) | 2:3.35-2ubuntu2.8 | libnss3-tools 2:3.35-2ubuntu2.8 | May 25, 2020 |
| libnss3-tools · Ubuntu 20.04 LTS (focal) | 2:3.49.1-1ubuntu1.1 | libnss3-tools 2:3.49.1-1ubuntu1.1 | May 25, 2020 |
| nspr · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nspr-devel · RHEL 8 | 0:4.25.0-2.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-softokn-freebl-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-sysinit · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-tools · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| nss-util-devel · RHEL 8 | 0:3.53.1-11.el8_2 | RHSA-2020:3280 | Aug 3, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.10.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.10.0+build1-0ubuntu0.18.04.1 | Oct 8, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.10.0+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:68.10.0+build1-0ubuntu0.20.04.1 | Oct 8, 2020 |
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