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Security Bulletin: Vulnerability CVE-2018-14647 in Python affects IBM i

Security Bulletin


Summary

Python is supported by IBM i. IBM i has addressed the applicable CVE.

Vulnerability Details

CVEID: CVE-2018-14647
DESCRIPTION: Python is vulnerable to a denial of service, caused by a flaw in the elementtree C accelerator. By using a specially-crafted XML document, a remote attacker could exploit this vulnerability to cause a resource exhaustion.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/150579 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)


Affected Products and Versions

Releases 7.1, 7.2 and 7.3 of IBM i are affected.

Remediation/Fixes

Releases 7.1, 7.2 and 7.3 of IBM i are supported and will be fixed.  The issue can be fixed by applying a PTF to IBM i or installing an rpm update based on Python version.

Release 7.1, 7.2 & 7.3 support python 3.4 and 2.7
The IBM i PTF numbers are:

SI69146 - 5733OPS Option 4 (python 2) [The same number PTF is applicable for all 3 OS releases]
SI69338 - 5733OPS Option 2 (python 3) [The same number PTF is applicable for all 3 OS releases]
[NOTE - SI69338 is the final PTF for 5733OPS Option 2 (python 3) as that option is no longer supported.  To remain on a supported version, migrate to PYTHON version 3.6 in rpm format.]
https://www-945.ibm.com/support/fixcentral/

Release 7.2 and 7.3 support PYTHON version 2.7 in rpm format

The recommended way to install these RPM's is to use the IBM i Access Client Solutions product or run '/QOpenSys/pkgs/bin/yum upgrade python2`. For more information about the packages in rpm format, see http://ibm.biz/ibmi-rpms

If deploying alternatively, PYTHON version 2.7 is available via: 
ftp://public.dhe.ibm.com/software/ibmi/products/pase/rpms/repo/ppc64/python2-2.7.16-1.ibmi7.1.ppc64.rpm

Release 7.2 and 7.3 support PYTHON version 3.6 in rpm format 
The recommended way to install these RPM's is to use the IBM i Access Client Solutions product or run '/QOpenSys/pkgs/bin/yum upgrade python3`. For more information about the packages in rpm format, see http://ibm.biz/ibmi-rpms/

If deploying alternatively, PYTHON version 3.6 is available via:
ftp://public.dhe.ibm.com/software/ibmi/products/pase/rpms/repo/ppc64/python3-3.6.8-1.ibmi7.1.ppc64.rpm

Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

Reference

Complete CVSS v3 Guide
On-line Calculator v3

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

25 March 2019: Original Version Published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.


Cross reference information
Product Component Platform Version Edition
IBM i 7.1 IBM i 7.1
IBM i 7.2 IBM i 7.2
IBM i 7.3 IBM i 7.3

Document information

More support for: IBM i

Software version: 7.1,7.2,7.3

Operating system(s): IBM i

Reference #: 0876694

Modified date: 25 March 2019