National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2018-14647 Detail

Current Description

Python's elementtree C accelerator failed to initialise Expat's hash salt during initialization. This could make it easy to conduct denial of service attacks against Expat by constructing an XML document that would cause pathological hash collisions in Expat's internal data structures, consuming large amounts CPU and RAM. Python 3.8, 3.7, 3.6, 3.5, 3.4, 2.7 are believed to be vulnerable.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.5 HIGH
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html
http://www.securityfocus.com/bid/105396 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1041740 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2019:1260
https://access.redhat.com/errata/RHSA-2019:2030
https://access.redhat.com/errata/RHSA-2019:3725
https://bugs.python.org/issue34623 Issue Tracking Patch Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647 Issue Tracking Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ Third Party Advisory
https://usn.ubuntu.com/3817-1/ Third Party Advisory
https://usn.ubuntu.com/3817-2/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4306 Third Party Advisory
https://www.debian.org/security/2018/dsa-4307 Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-909 Missing Initialization of Resource NIST  
CWE-665 Improper Initialization Red Hat, Inc.  
CWE-335 Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG) Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
2.7.0
Up to (including)
2.7.15
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
3.4.0
Up to (including)
3.4.9
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
3.5.0
Up to (including)
3.5.6
 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
3.6.0
Up to (excluding)
3.6.7
 cpe:2.3:a:python:python:3.7.0:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

17 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-14647
NVD Published Date:
09/24/2018
NVD Last Modified:
10/02/2019