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Ubuntu Security Notice USN-3616-2
April 09, 2018

python-crypto vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 ESM

Summary:

Python Crypto could expose sensitive information.

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

Details:

USN-3616-1 fixed a vulnerability in Python Crypto. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 It was discovered that Python Crypto incorrectly generated ElGamal key
 parameters. A remote attacker could possibly use this issue to obtain
 sensitive information.

Update instructions:

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

Ubuntu 12.04 ESM:
  python-crypto                   2.4.1-1ubuntu0.3
  python3-crypto                  2.4.1-1ubuntu0.3

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

References:
  https://usn.ubuntu.com/usn/usn-3616-2
  https://usn.ubuntu.com/usn/usn-3616-1
  CVE-2018-6594