ESB-2017.1562 - [Ubuntu] libnss3: Denial of service - Remote/unauthenticated 2017-06-22

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2017.1562
                             NSS vulnerability
                               22 June 2017

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           libnss3
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-7502  

Reference:         ESB-2017.1557
                   ESB-2017.1404
                   ESB-2017.1368
                   ESB-2017.1367

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3336-1

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==========================================================================
Ubuntu Security Notice USN-3336-1
June 21, 2017

nss vulnerability
==========================================================================

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

- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

NSS could be made to crash if it received specially crafted network
traffic.

Software Description:
- - nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled certain empty SSLv2
messages. A remote attacker could possibly use this issue to cause NSS to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 17.04:
  libnss3                         2:3.28.4-0ubuntu0.17.04.2

Ubuntu 16.10:
  libnss3                         2:3.28.4-0ubuntu0.16.10.2

Ubuntu 16.04 LTS:
  libnss3                         2:3.28.4-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
  libnss3                         2:3.28.4-0ubuntu0.14.04.2

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

References:
  https://www.ubuntu.com/usn/usn-3336-1
  CVE-2017-7502

Package Information:
  https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.17.04.2
  https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.10.2
  https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.2
  https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.14.04.2

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===========================================================================
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