ESB-2019.0080 - [Ubuntu] libnss3: Multiple vulnerabilities 2019-01-10

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             AUSCERT External Security Bulletin Redistribution

                            NSS vulnerabilities
                              10 January 2019


        AusCERT Security Bulletin Summary

Product:           libnss3
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Existing Account      
                   Unauthorised Access    -- Remote/Unauthenticated
                   Reduced Security       -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-12404 CVE-2018-12384 CVE-2018-0495

Reference:         ESB-2019.0010

Original Bulletin:

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USN-3850-1: NSS vulnerabilities

9 January 2019

nss vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 18.10
  o Ubuntu 18.04 LTS
  o Ubuntu 16.04 LTS
  o Ubuntu 14.04 LTS


Several security issues were fixed in NSS.

Software Description

  o nss - Network Security Service library


Keegan Ryan discovered that NSS incorrectly handled ECDSA key generation. A
local attacker could possibly use this issue to perform a cache-timing attack
and recover private ECDSA keys. (CVE-2018-0495)

It was discovered that NSS incorrectly handled certain v2-compatible
ClientHello messages. A remote attacker could possibly use this issue to
perform a replay attack. (CVE-2018-12384)

It was discovered that NSS incorrectly handled certain padding oracles. A
remote attacker could possibly use this issue to perform a variant of the
Bleichenbacher attack. (CVE-2018-12404)

Update instructions

The problem can be corrected by updating your system to the following package

Ubuntu 18.10
    libnss3 - 2:3.36.1-1ubuntu1.1
Ubuntu 18.04 LTS
    libnss3 - 2:3.35-2ubuntu2.1
Ubuntu 16.04 LTS
    libnss3 - 2:3.28.4-0ubuntu0.16.04.4
Ubuntu 14.04 LTS
    libnss3 - 2:3.28.4-0ubuntu0.14.04.4

To update your system, please follow these instructions: https://

After a standard system update you need to restart any applications that use
NSS, such as Evolution, to make all the necessary changes.


  o CVE-2018-0495
  o CVE-2018-12384
  o CVE-2018-12404

(C) 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
Canonical Ltd.

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