Ubuntu alert USN-3138-1 (python-cryptography)

From:
    	     
 
Marc Deslauriers <marc.deslauriers@canonical.com> 
To:
    	     
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	     
 
[USN-3138-1] python-cryptography vulnerability 
Date:
    	     
 
Mon, 28 Nov 2016 14:52:37 -0500
Message-ID:
    	     
 
<69d566ea-fc76-8c02-d1f4-eba2a5ecc999@canonical.com>
==========================================================================
Ubuntu Security Notice USN-3138-1
November 28, 2016

python-cryptography vulnerability
==========================================================================

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS

Summary:

python-cryptography could generate incorrect keys.

Software Description:
- python-cryptography: Cryptography Python library

Details:

Markus Döring discovered that python-cryptography incorrectly handled
certain HKDF lengths. This could result in python-cryptography returning an
empty string instead of the expected derived key.

Update instructions:

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

Ubuntu 16.10:
  python-cryptography             1.5-2ubuntu0.1
  python3-cryptography            1.5-2ubuntu0.1

Ubuntu 16.04 LTS:
  python-cryptography             1.2.3-1ubuntu0.1
  python3-cryptography            1.2.3-1ubuntu0.1

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

References:
  http://www.ubuntu.com/usn/usn-3138-1
  CVE-2016-9243

Package Information:
  https://launchpad.net/ubuntu/+source/python-cryptography/...
  https://launchpad.net/ubuntu/+source/python-cryptography/...


-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-security...