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Ubuntu Security Notice USN-3199-3

Ubuntu Security Notice USN-3199-3
Posted Aug 28, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3199-3 - USN-3199-1 fixed a vulnerability in Python Crypto. This update provides the corresponding update for Ubuntu 12.04 ESM. A It was discovered that the ALGnew function in block_templace.c in the A Python Cryptography Toolkit contained a heap-based buffer overflow A vulnerability. A remote attacker could use this flaw to execute A arbitrary code by using a crafted initialization vector parameter. Various other issues were also addressed.

tags | advisory, remote, overflow, arbitrary, crypto, python
systems | linux, ubuntu
MD5 | 268bc2efb224a1765a620d2ba927ba05

Ubuntu Security Notice USN-3199-3

Change Mirror Download
==========================================================================
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:

A It was discovered that the ALGnew function in block_templace.c in the
A Python Cryptography Toolkit contained a heap-based buffer overflow
A vulnerability. A remote attacker could use this flaw to execute
A 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:
A python-cryptoA A A A A A A A A A A A A A A A A A A 2.4.1-1ubuntu0.2
A python3-cryptoA A A A A A A A A A A A A A A A A A 2.4.1-1ubuntu0.2

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

References:
A https://www.ubuntu.com/usn/usn-3199-3
A https://www.ubuntu.com/usn/usn-3199-1
A CVE-2013-7459

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