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Ubuntu Security Notice USN-3431-1

Ubuntu Security Notice USN-3431-1
Posted Oct 2, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3431-1 - Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.

tags | advisory, remote, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2017-7805
SHA-256 | fe4737be42f43b336a1e315a9ed5152bf39d71a53f4cc93be2c015a4a5083301

Ubuntu Security Notice USN-3431-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3431-1
October 02, 2017

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

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

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

Software Description:
- nss: Network Security Service library

Details:

Martin Thomson discovered that NSS incorrectly generated handshake hashes.
A remote attacker could use this issue to cause NSS to crash, resulting in
a denial of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 17.04:
libnss3 2:3.28.4-0ubuntu0.17.04.3

Ubuntu 16.04 LTS:
libnss3 2:3.28.4-0ubuntu0.16.04.3

Ubuntu 14.04 LTS:
libnss3 2:3.28.4-0ubuntu0.14.04.3

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-3431-1
CVE-2017-7805

Package Information:
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.17.04.3
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.3
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.14.04.3


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