USN-3431-1: NSS vulnerability

USN-3431-1: NSS vulnerability

Ubuntu Security Notice USN-3431-1

2nd October, 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 version:

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

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

CVE-2017-7805

Source: USN-3431-1: NSS vulnerability

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