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AUSCERT External Security Bulletin Redistribution
USN-4397-2: NSS vulnerability
18 June 2020
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Existing Account
CVE Names: CVE-2020-12399
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USN-4397-2: NSS vulnerability
17 June 2020
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
NSS could be made to expose sensitive information over the network.
o nss - Network Security Service library
USN-4397-1 fixed a vulnerability in NSS. This update provides the corresponding
update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key
generation. A local attacker could possibly use this issue to perform a timing
attack and recover DSA keys. (CVE-2020-12399)
The problem can be corrected by updating your system to the following package
Ubuntu 14.04 ESM
libnss3 - 2:3.28.4-0ubuntu0.14.04.5+esm5
Ubuntu 12.04 ESM
libnss3 - 2:3.28.4-0ubuntu0.12.04.8
To update your system, please follow these instructions: https://
After a standard system update you need to reboot your computer to make all the
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