CVE-2020-12399

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

https://www.mozilla.org/security/advisories/mfsa2020-20/

https://www.mozilla.org/security/advisories/mfsa2020-21/

https://bugzilla.mozilla.org/show_bug.cgi?id=1631576

https://www.mozilla.org/security/advisories/mfsa2020-22/

https://www.debian.org/security/2020/dsa-4726

https://usn.ubuntu.com/4421-1/

https://security.gentoo.org/glsa/202007-49

https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html

Details

Source: MITRE

Published: 2020-07-09

Updated: 2022-01-04

Type: CWE-203

Risk Information

CVSS v2

Base Score: 1.2

Vector: AV:L/AC:H/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 1.9

Severity: LOW

CVSS v3

Base Score: 4.4

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM

Tenable Plugins

View all (28 total)

IDNameProductFamilySeverity
150659SUSE SLES11 Security Update : mozilla-nspr, mozilla-nss (SUSE-SU-2020:14418-1)NessusSuSE Local Security Checks
critical
147683EulerOS Virtualization 2.9.0 : nss (EulerOS-SA-2021-1640)NessusHuawei Local Security Checks
critical
147550EulerOS Virtualization 2.9.1 : nss (EulerOS-SA-2021-1615)NessusHuawei Local Security Checks
critical
147038EulerOS Virtualization for ARM 64 3.0.6.0 : nss-softokn (EulerOS-SA-2021-1536)NessusHuawei Local Security Checks
critical
144169EulerOS 2.0 SP8 : nss-softokn (EulerOS-SA-2020-2523)NessusHuawei Local Security Checks
critical
143400EulerOS 2.0 SP9 : nss (EulerOS-SA-2020-2487)NessusHuawei Local Security Checks
critical
143390EulerOS 2.0 SP9 : nss (EulerOS-SA-2020-2500)NessusHuawei Local Security Checks
critical
141062Debian DLA-2388-1 : nss security updateNessusDebian Local Security Checks
critical
138972GLSA-202007-49 : Mozilla Network Security Service (NSS): Information disclosureNessusGentoo Local Security Checks
medium
138700openSUSE Security Update : mozilla-nspr / mozilla-nss (openSUSE-2020-854)NessusSuSE Local Security Checks
critical
138646Debian DSA-4726-1 : nss - security updateNessusDebian Local Security Checks
critical
138326Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : Thunderbird vulnerabilities (USN-4421-1)NessusUbuntu Local Security Checks
high
138314SUSE SLES12 Security Update : mozilla-nspr, mozilla-nss (SUSE-SU-2020:1839-1)NessusSuSE Local Security Checks
critical
138274SUSE SLED15 / SLES15 Security Update : mozilla-nspr, mozilla-nss (SUSE-SU-2020:1677-1)NessusSuSE Local Security Checks
critical
137909Debian DLA-2266-1 : nss security updateNessusDebian Local Security Checks
medium
137555Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : NSS vulnerabilities (USN-4397-1)NessusUbuntu Local Security Checks
medium
137417Debian DLA-2247-1 : thunderbird security updateNessusDebian Local Security Checks
high
137375Debian DSA-4702-1 : thunderbird - security updateNessusDebian Local Security Checks
high
137284Debian DLA-2243-1 : firefox-esr security update NessusDebian Local Security Checks
high
137179Ubuntu 16.04 LTS / 18.04 LTS / 19.10 / 20.04 : firefox vulnerabilities (USN-4383-1)NessusUbuntu Local Security Checks
high
137177Slackware 14.2 / current : mozilla-thunderbird (SSA:2020-156-01)NessusSlackware Local Security Checks
high
137155Debian DSA-4695-1 : firefox-esr - security updateNessusDebian Local Security Checks
high
137087Mozilla Thunderbird < 68.9.0NessusWindows
high
137086Mozilla Thunderbird < 68.9.0NessusMacOS X Local Security Checks
high
137051Mozilla Firefox ESR < 68.9NessusWindows
medium
137050Mozilla Firefox ESR < 68.9NessusMacOS X Local Security Checks
medium
137049Mozilla Firefox < 77.0NessusWindows
high
137048Mozilla Firefox < 77.0NessusMacOS X Local Security Checks
high