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Ubuntu Security Notice USN-3199-1

Ubuntu Security Notice USN-3199-1
Posted Feb 17, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3199-1 - It was discovered that the ALGnew function in block_templace.c in the Python Cryptography Toolkit contained a heap-based buffer overflow vulnerability. A remote attacker could use this flaw to execute arbitrary code by using a crafted initialization vector parameter.

tags | advisory, remote, overflow, arbitrary, python
systems | linux, ubuntu
SHA-256 | e8a7c38d5847c9eb619e356107017e6f6145e41512cc339e081a0c3d1ef48e20

Ubuntu Security Notice USN-3199-1

Change Mirror Download

===========================================================================
Ubuntu Security Notice USN-3199-1
February 16, 2017

Python Crypto vulnerability
===========================================================================

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Programs using the Python Cryptography Toolkit could be made to crash or run
programs if they receive specially crafted network traffic or other input.

Software Description:
- python-crypto: cryptographic algorithms and protocols for Python

Details:

It was discovered that the ALGnew function in block_templace.c in the Python
Cryptography Toolkit contained a heap-based buffer overflow vulnerability.
A remote attacker could use this flaw to execute arbitrary code by using
a crafted initialization vector parameter.

Update instructions:

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

Ubuntu 16.10:
=C2=A0 python-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-6ubuntu0.16.10.2
=C2=A0 python3-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-6ubuntu0.16.10.2

Ubuntu 16.04 LTS:
=C2=A0 python-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-6ubuntu0.16.04.1
=C2=A0 python3-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-6ubuntu0.16.04.1

Ubuntu 14.04 LTS:
=C2=A0 python-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-4ubuntu0.1
=C2=A0 python3-crypto=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A02.6.1-4ubuntu0.1

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

References:
=C2=A0 http://www.ubuntu.com/usn/usn-3199-1
=C2=A0 CVE-2013-7459

Package Information:
=C2=A0 https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-6ubuntu0.16.10.2
=C2=A0 https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-6ubuntu0.16.04.1
=C2=A0 https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-4ubuntu0.1
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