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Category:   Application (Generic)  >   Python Vendors:   Python.org
(Ubuntu Issues Fix) Python elementtree C Accelerator Lets Remote Users Consume Excessive CPU and Memory Resources
SecurityTracker Alert ID:  1042093
SecurityTracker URL:  http://securitytracker.com/id/1042093
CVE Reference:   CVE-2018-14647   (Links to External Site)
Date:  Nov 13 2018
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Python. A remote user can consume excessive CPU and memory on the target system in certain cases.

The elementtree C accelerator does not call XML_SetHashSalt() to initialize Expat's hash salt during initialization. A remote user can create a specially crafted XML document that, when loaded by the target application, will trigger hash collisions in the Expat internal data structures to consume excessive CPU and memory resources on the target system.

The Python Security Response Team reported this vulnerability.

Impact:   A remote user can consume excessive CPU and memory resources on the target system.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://usn.ubuntu.com/usn/usn-3817-1

Vendor URL:  usn.ubuntu.com/usn/usn-3817-1 (Links to External Site)
Cause:   State error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  14.04 LTS, 16.04 LTS, 18.04 LTS

Message History:   This archive entry is a follow-up to the message listed below.
Sep 29 2018 Python elementtree C Accelerator Lets Remote Users Consume Excessive CPU and Memory Resources



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