7.5
HIGH
CVE-2018-14647
Python Elementtree Expat Hash Collision Vulnerability
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. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.

INFO

Published Date :

Sept. 25, 2018, 12:29 a.m.

Last Modified :

Nov. 7, 2023, 2:53 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2018-14647 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2018-14647 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Redhat enterprise_linux_desktop
2 Redhat enterprise_linux_server
3 Redhat enterprise_linux_workstation
1 Canonical ubuntu_linux
1 Fedoraproject fedora
1 Debian debian_linux
1 Opensuse leap
1 Python python
: Total Affected Vendor : 6 | Products : 8
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2018-14647.

URL Resource
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html Mailing List Third Party Advisory
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 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2030 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:3725 Third Party Advisory
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.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/
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

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
vincent-deng/veracode-container-security-finding-parser

Map Vulnerabilities into Different Layers of the Container Image

Python

Updated: 1 year, 8 months ago
1 stars 0 fork 0 watcher
Born at : Oct. 5, 2022, 12:07 p.m. This repo has been linked 1276 different CVEs too.
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revl-ca/scan-docker-image

None

Shell

Updated: 5 years, 2 months ago
0 stars 0 fork 0 watcher
Born at : July 18, 2019, 10:49 p.m. This repo has been linked 124 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2018-14647 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2018-14647 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ [No types assigned]
    Added Reference Red Hat, Inc. https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E [No types assigned]
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/
    Removed Reference Red Hat, Inc. https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E
  • CVE Modified by [email protected]

    Jul. 29, 2020

    Action Type Old Value New Value
    Added Reference https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E [No Types Assigned]
  • Modified Analysis by [email protected]

    Jul. 07, 2020

    Action Type Old Value New Value
    Removed CVSS V3 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html No Types Assigned http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html Mailing List, Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2019:1260 No Types Assigned https://access.redhat.com/errata/RHSA-2019:1260 Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2019:2030 No Types Assigned https://access.redhat.com/errata/RHSA-2019:2030 Third Party Advisory
    Changed Reference Type https://access.redhat.com/errata/RHSA-2019:3725 No Types Assigned https://access.redhat.com/errata/RHSA-2019:3725 Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html No Types Assigned https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html Mailing List, Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html No Types Assigned https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html Mailing List, Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (including) 2.7.15 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (including) 3.4.9 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (including) 3.5.6 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.7 *cpe:2.3:a:python:python:3.7.0:*:*:*:*:*:*:* OR *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (including) 2.7.15 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (including) 3.4.9 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (including) 3.5.6 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (including) 3.6.6 *cpe:2.3:a:python:python:3.7.0:*:*:*:*:*:*:*
    Changed CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* OR *cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
    Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jul. 06, 2020

    Action Type Old Value New Value
    Changed 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. 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. The vulnerability exists in Python versions 3.7.0, 3.6.0 through 3.6.6, 3.5.0 through 3.5.6, 3.4.0 through 3.4.9, 2.7.0 through 2.7.15.
  • CVE Modified by [email protected]

    Jan. 21, 2020

    Action Type Old Value New Value
    Added Reference http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00040.html [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 06, 2019

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2019:3725 [No Types Assigned]
  • CVE Modified by [email protected]

    Oct. 09, 2019

    Action Type Old Value New Value
    Added CVSS V3 Red Hat, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
    Added CWE Red Hat, Inc. CWE-335
    Added CWE Red Hat, Inc. CWE-665
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-399 CWE-399 CWE-909
  • CVE Modified by [email protected]

    Aug. 06, 2019

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2019:2030 [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 25, 2019

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2019/06/msg00023.html [No Types Assigned]
    Added Reference https://lists.debian.org/debian-lts-announce/2019/06/msg00022.html [No Types Assigned]
  • CVE Modified by [email protected]

    May. 22, 2019

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2019:1260 [No Types Assigned]
  • Modified Analysis by [email protected]

    Apr. 18, 2019

    Action Type Old Value New Value
    Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ Third Party Advisory
    Changed CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* OR *cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Mar. 29, 2019

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RBJCB2HWOJLP3L7CUQHJHNBHLSVOXJE5/ [No Types Assigned]
  • Initial Analysis by [email protected]

    Dec. 20, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type http://www.securityfocus.com/bid/105396 No Types Assigned http://www.securityfocus.com/bid/105396 Third Party Advisory, VDB Entry
    Changed Reference Type https://bugs.python.org/issue34623 No Types Assigned https://bugs.python.org/issue34623 Issue Tracking, Patch, Vendor Advisory
    Changed Reference Type https://usn.ubuntu.com/3817-1/ No Types Assigned https://usn.ubuntu.com/3817-1/ Third Party Advisory
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14647 Issue Tracking, Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2018/dsa-4306 No Types Assigned https://www.debian.org/security/2018/dsa-4306 Third Party Advisory
    Changed Reference Type https://www.debian.org/security/2018/dsa-4307 No Types Assigned https://www.debian.org/security/2018/dsa-4307 Third Party Advisory
    Changed Reference Type http://www.securitytracker.com/id/1041740 No Types Assigned http://www.securitytracker.com/id/1041740 Third Party Advisory, VDB Entry
    Changed Reference Type https://usn.ubuntu.com/3817-2/ No Types Assigned https://usn.ubuntu.com/3817-2/ Third Party Advisory
    Added CWE CWE-399
    Added CPE Configuration OR *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (including) 2.7.15 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (including) 3.4.9 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.5.0 up to (including) 3.5.6 *cpe:2.3:a:python:python:*:*:*:*:*:*:*:* versions from (including) 3.6.0 up to (excluding) 3.6.7 *cpe:2.3:a:python:python:3.7.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Nov. 16, 2018

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/3817-2/ [No Types Assigned]
  • CVE Modified by [email protected]

    Nov. 14, 2018

    Action Type Old Value New Value
    Added Reference https://usn.ubuntu.com/3817-1/ [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 30, 2018

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1041740 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 29, 2018

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2018/dsa-4307 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 28, 2018

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2018/dsa-4306 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 27, 2018

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/105396 [No Types Assigned]
  • CVE Modified by [email protected]

    Sep. 25, 2018

    Action Type Old Value New Value
    Changed 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 contructing 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. 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.
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2018-14647 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2018-14647 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.89 }} 0.26%

score

0.82779

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
: