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USN-3199-1: Python Crypto vulnerability

16 February 2017

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

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Releases

Packages

  • 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.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 16.10
Ubuntu 16.04
Ubuntu 14.04

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

References

Related notices

  • USN-3199-2: python-crypto-doc, python3-crypto, python-crypto
  • USN-3199-3: python3-crypto, python-crypto

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Further reading