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AUSCERT External Security Bulletin Redistribution
ESB-2017.0462.2
Python Crypto vulnerability
17 February 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Python
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2013-7459
Original Bulletin:
http://www.ubuntu.com/usn/usn-3199-1
Revision History: February 17 2017: Error in tag
February 17 2017: Initial Release
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Ubuntu Security Notice USN-3199-1
February 16, 2017
Python Crypto vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
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:
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 16.10:
python-crypto 2.6.1-6ubuntu0.16.10.2
python3-crypto 2.6.1-6ubuntu0.16.10.2
Ubuntu 16.04 LTS:
python-crypto 2.6.1-6ubuntu0.16.04.1
python3-crypto 2.6.1-6ubuntu0.16.04.1
Ubuntu 14.04 LTS:
python-crypto 2.6.1-4ubuntu0.1
python3-crypto2.6.1-4ubuntu0.1
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3199-1
CVE-2013-7459
Package Information:
https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-6ubuntu0.16.10.2
https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-6ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/python-crypto/2.6.1-4ubuntu0.1
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