CVE-2020-12399

Publication date 26 May 2020

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

4.4 · Medium

Score breakdown

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.

Status

Package Ubuntu Release Status
thunderbird 20.04 LTS focal
Fixed 1:68.10.0+build1-0ubuntu0.20.04.1
19.10 eoan
Fixed 1:68.10.0+build1-0ubuntu0.19.10.1
18.04 LTS bionic
Fixed 1:68.10.0+build1-0ubuntu0.18.04.1
16.04 LTS xenial
Fixed 1:68.10.0+build1-0ubuntu0.16.04.1
14.04 LTS trusty Not in release
firefox 20.04 LTS focal
Fixed 77.0.1+build1-0ubuntu0.20.04.1
19.10 eoan
Fixed 77.0.1+build1-0ubuntu0.19.10.1
18.04 LTS bionic
Fixed 77.0.1+build1-0ubuntu0.18.04.1
16.04 LTS xenial
Fixed 77.0.1+build1-0ubuntu0.16.04.1
14.04 LTS trusty Not in release
nss 20.04 LTS focal
Fixed 2:3.49.1-1ubuntu1.1
19.10 eoan
Fixed 2:3.45-1ubuntu2.3
18.04 LTS bionic
Fixed 2:3.35-2ubuntu2.8
16.04 LTS xenial
Fixed 2:3.28.4-0ubuntu0.16.04.11
14.04 LTS trusty
Fixed 2:3.28.4-0ubuntu0.14.04.5+esm5

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
nss

Severity score breakdown

Parameter Value
Base score 4.4 · Medium
Attack vector Local
Attack complexity High
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

References

Related Ubuntu Security Notices (USN)

Other references