==========================================================================
Ubuntu Security Notice USN-3199-3
August 28, 2017
python-crypto vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 12.04 ESM
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:
USN-3199-1 fixed a vulnerability in Python Crypto. This update
provides the corresponding update for Ubuntu 12.04 ESM.
Original advisory 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 12.04 ESM:
python-crypto 2.4.1-1ubuntu0.2
python3-crypto 2.4.1-1ubuntu0.2
In general, a standard system update will make all the necessary
changes.
References:
https://www.ubuntu.com/usn/usn-3199-3
https://www.ubuntu.com/usn/usn-3199-1
CVE-2013-7459
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