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Category:   Application (Generic)  >   Python Vendors:   Python.org
Python Hash Table Collision Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1026478
SecurityTracker URL:  http://securitytracker.com/id/1026478
CVE Reference:   CVE-2012-1150   (Links to External Site)
Updated:  Nov 5 2012
Original Entry Date:  Dec 29 2011
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 2.6.8, 2.7.x prior to 2.7.3, 3.x prior to 3.1.5, and 3.2.x prior to 3.2.3
Description:   A vulnerability was reported in Python. A remote user can cause denial of service conditions.

A remote user can send specially crafted POST request values to trigger hash collisions and cause significant performance degradation on the target server.

The original advisory is available at:

http://www.nruns.com/_downloads/advisory28122011.pdf

Alexander Klink of n.runs AG and Julian Walde of Technische Universitat Darmstadt reported this vulnerability. Scott A. Crosby and Dan S. Wallach of Rice University reported the theoretical attack.

Impact:   A remote user can cause performance to degrade on the target server.
Solution:   The vendor has issued a fix (2.6.8, 2.7.3, 3.1.5, 3.2.3).
Vendor URL:  python.org/ (Links to External Site)
Cause:   Randomization error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Nov 5 2012 (Splunk Issues Fix) Python Hash Table Collision Bug Lets Remote Users Deny Service
Splunk has issued a fix.
Apr 11 2013 (Oracle Issues Fix for Solaris) Python Hash Table Collision Bug Lets Remote Users Deny Service
Oracle has issued a fix for Solaris 10 and 11.1.



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