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CVE-2018-14647

HIGHCVSS 7.5/10EPSS 10.91%

Last modified

CVE-2018-14647 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 10.91% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
10.91%

95.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PythonPython>= 2.7.0, <= 2.7.15
PythonPython>= 3.4.0, <= 3.4.9
PythonPython>= 3.5.0, <= 3.5.6
PythonPython>= 3.6.0, <= 3.6.6
PythonPython3.7.0
CanonicalUbuntu Linux12.04
CanonicalUbuntu Linux14.04
CanonicalUbuntu Linux16.04
CanonicalUbuntu Linux18.04
DebianDebian Linux8.0
DebianDebian Linux9.0
FedoraprojectFedora30
OpensuseLeap15.1
RedhatEnterprise Linux Desktop7.0
RedhatEnterprise Linux Server7.0
RedhatEnterprise Linux Workstation7.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-14647?
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.
How severe is CVE-2018-14647?
CVE-2018-14647 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 10.91% probability of exploitation in the next 30 days.
How do I fix CVE-2018-14647?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-14647?

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Source: NVD / NIST