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Ubuntu Security Notice USN-3064-1

Ubuntu Security Notice USN-3064-1
Posted Aug 21, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3064-1 - Felix Doerre and Vladimir Klebanov discovered that GnuPG incorrectly handled mixing functions in the random number generator. An attacker able to obtain 4640 bits from the RNG can trivially predict the next 160 bits of output.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2016-6313
SHA-256 | 32f0380e387cc522e4861cb3c5789969e6795c00bc238ae1cf1d227ac0f155b5

Ubuntu Security Notice USN-3064-1

Change Mirror Download

===========================================================================
Ubuntu Security Notice USN-3064-1
August 18, 2016

gnupg vulnerability
===========================================================================

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

- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

GnuPG incorrectly generated random numbers.

Software Description:
- gnupg: GNU privacy guard - a free PGP replacement

Details:

Felix D=C3=B6rre and Vladimir Klebanov discovered that GnuPG incorrectly handled
mixing functions in the random number generator. An attacker able to obtain
4640 bits from the RNG can trivially predict the next 160 bits of output.

Update instructions:

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

Ubuntu 16.04 LTS:
gnupg 1.4.20-1ubuntu3.1

Ubuntu 14.04 LTS:
gnupg 1.4.16-1ubuntu2.4

Ubuntu 12.04 LTS:
gnupg 1.4.11-3ubuntu2.10

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-3064-1
CVE-2016-6313

Package Information:
https://launchpad.net/ubuntu/+source/gnupg/1.4.20-1ubuntu3.1
https://launchpad.net/ubuntu/+source/gnupg/1.4.16-1ubuntu2.4
https://launchpad.net/ubuntu/+source/gnupg/1.4.11-3ubuntu2.10



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