Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.
The remote Ubuntu host is missing one or more security-related
USN-3199-1 fixed a vulnerability in the Python Cryptography Toolkit.
Unfortunately, various programs depended on the original behavior of
the Python Cryptography Toolkit which was altered when fixing the
vulnerability. This update retains the fix for the vulnerability but
issues a warning rather than throwing an exception. Code which
produces this warning should be updated because future versions of the
Python Cryptography Toolkit re-introduce the exception.
We apologize for the inconvenience.
It was discovered that the ALGnew function in block_template.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.
Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.
Update the affected python-crypto and / or python3-crypto packages.
Risk factor :
High / CVSS Base Score : 7.5
CVSS Temporal Score : 6.2
Public Exploit Available : true