CVE-2018-14647

Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 25 Sept 2018, 00:00
Last modified:05 Aug 2024, 09:38

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
1.25% LOW
1% probability -0.65%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Sept 2018, 00:00
Published
Vulnerability first disclosed
05 Aug 2024, 09:38
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.0•MEDIUM•Score: 5.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 1.25%• Percentile: 80%

Techniques & Countermeasures

  • CWE-909•Missing Initialization of Resource

    The product does not initialize a critical resource.

  • CWE-665•Improper Initialization

    The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.

  • CWE-335•Incorrect Usage of Seeds in Pseudo-Random Number Generator (PRNG)

    The product uses a Pseudo-Random Number Generator (PRNG) but does not correctly manage seeds.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 18.04

  • debian•debian_linux

    8.0 | 9.0

  • fedoraproject•fedora

    30

  • opensuse•leap

    15.1

  • python•python

    ≥ 2.7.0, ≤ 2.7.15 | ≥ 3.4.0, ≤ 3.4.9 | ≥ 3.5.0, ≤ 3.5.6 | ≥ 3.6.0, ≤ 3.6.6 | 3.7.0

  • redhat•enterprise_linux_desktop

    7.0

  • redhat•enterprise_linux_server

    7.0

  • redhat•enterprise_linux_workstation

    7.0

  • the python project•python

    3.8, 3.7, 3.6, 3.5, 3.4, 2.7

References (16)