What’s Vulnerable › Vulnerabilities

CVE-2020-14422

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 12.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-18 · updated 2026-10-14
• Weakness: CWE-330

Description

Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a remote attacker to cause a denial of service if an application is affected by the performance of a dictionary containing IPv4Interface or IPv6Interface objects, and this attacker can cause many dictionary entries to be created. This is fixed in: v3.5.10, v3.5.10rc1; v3.6.12; v3.7.9; v3.8.4, v3.8.4rc1, v3.8.5, v3.8.6, v3.8.6rc1; v3.9.0, v3.9.0b4, v3.9.0b5, v3.9.0rc1, v3.9.0rc2.

Affected products

• Fedoraproject Fedora: 31, 32
• openSUSE Leap: 15.1, 15.2
• Oracle Corporation Enterprise Manager Ops Center: 12.4.0.0
• Python: from 3.0.0 before 3.5.10; from 3.6.0 before 3.6.12; from 3.7.0 before 3.7.9; from 3.8.0 before 3.8.4 — fixed in 3.5.10, 3.6.12, 3.7.9, 3.8.4

How to fix

Upgrade to a fixed version: Python 3.5.10, 3.6.12, 3.7.9, 3.8.4. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00032.html
• http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00041.html
• https://bugs.python.org/issue41004
• https://github.com/python/cpython/pull/20956
• https://lists.debian.org/debian-lts-announce/2020/07/msg00011.html
• https://lists.debian.org/debian-lts-announce/2023/05/msg00016.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46POCIYYTAKZ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCCZTAYZATTNSNEAXWA7U3HCO2OVQKT5/

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