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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1834-1 python2.7 security update
Debian DLA Debian DLA DLA-1835-1 python3.4 security update
Debian DSA Debian DSA DSA-4306-1 python2.7 security update
Debian DSA Debian DSA DSA-4307-1 python3.5 security update
EUVD EUVD EUVD-2018-6545 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.
Ubuntu USN Ubuntu USN USN-3817-1 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-3817-2 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-6891-1 Python vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.01275}

epss

{'score': 0.01572}


Fri, 11 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.013}

epss

{'score': 0.01275}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-05T09:38:13.104Z

Reserved: 2018-07-27T00:00:00

Link: CVE-2018-14647

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-09-25T00:29:00.703

Modified: 2024-11-21T03:49:30.067

Link: CVE-2018-14647

cve-icon Redhat

Severity : Moderate

Publid Date: 2018-09-22T00:00:00Z

Links: CVE-2018-14647 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses