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CVE-2020-14422

21
FAUCET Score

CVE-2020-14422 is a denial-of-service vulnerability in Python's ipaddress module (Lib/ipaddress.py) affecting versions through 3.8.3, as well as fedoraproject, opensuse, and oracle distributions. It allows a remote attacker to cause a denial of service by exploiting improperly computed hash values in IPv4Interface and IPv6Interface classes, leading to performance degradation in dictionaries containing these objects. Rated Medium severity (CVSS 5.9), the attack requires high complexity and no user interaction, but can result in high availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.5.10CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.6.0, < 3.6.12CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.7.0, < 3.7.9CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.8.0, < 3.8.4CPE matchmatch criteria
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
15.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
12.39%
Probability of exploitation in next 30 days
EPSS Percentile
95.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1239 is in the 96th percentile among its peer group of 19,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (37)

microsoftpatch availablevia msrc
Product: 17032-16820Fixed in: 3.7.10-3
microsoftpatch availablevia msrc
Product: cm1 python3 3.7.10-3 on CBL Mariner 1.0Fixed in: 3.7.10-3
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 3.7.10-3
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 3.7.10-3
nodejspatch availablevia llm_extracted
View patch
pjsippatch availablevia llm_extracted
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-python36-python-virtualenv-0:15.1.0-3.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python36-python-0:3.6.12-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python36-python-pip-0:9.0.1-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python36-python-virtualenv-0:15.1.0-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python38-python-0:3.8.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python38-python-psutil-0:5.6.4-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-python38-python-urllib3-0:1.25.7-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python36-python-0:3.6.12-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python36-python-pip-0:9.0.1-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python36-python-virtualenv-0:15.1.0-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python38-python-0:3.8.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python38-python-psutil-0:5.6.4-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-python38-python-urllib3-0:1.25.7-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python36-python-0:3.6.12-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python36-python-pip-0:9.0.1-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python36-python-virtualenv-0:15.1.0-3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python38-python-0:3.8.6-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python38-python-psutil-0:5.6.4-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUSFixed in: rh-python38-python-urllib3-0:1.25.7-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python38:3.8-8030020200818121840.4190259b
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-python36-python-pip-0:9.0.1-5.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python3-0:3.6.8-18.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python3-0:3.6.8-31.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-python36-python-0:3.6.12-1.el6
View patch
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: python27-python-pip
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-python38-python-pip
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-pip
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: python-ipaddress
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python27:2.7/python2-pip
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: python27:2.7/python-ipaddress
redhatend of lifevia redhat_api
Product: Red Hat Quay 3Fixed in: python-ipaddress

Vendor Advisories (5)

nodejsllm-nodejs-302528ae26f0d946CRITICAL

HP ThinPro 8.1 SP4 Security Updates

Oct 29, 2024
pjsipllm-pjsip-7ba3ec379210ac70CRITICAL

HP ThinPro 8.1 SP4 Security Updates

Oct 29, 2024
microsoft2020-Nov/CVE-2020-14422

CVE-2020-14422

Nov 10, 2020
redhatCVE-2020-14422Moderate

python: DoS via inefficiency in IPv{4,6}Interface classes

Jun 18, 2020
microsoft2020-Jun/CVE-2020-14422Moderate

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.

Jun 9, 2020

References

lists.opensuse.org / opensuse-security-announce/2020-07/msg00003.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00006.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00032.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2020-07/msg00041.html
Mailing ListThird Party Advisory
bugs.python.org / issue41004
Vendor Advisory
github.com / python/cpython/pull/20956
Issue TrackingThird Party Advisory
lists.debian.org / debian-lts-announce/2020/07/msg00011.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2023/05/msg00016.html
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46POCIYYTAKZ
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/FCCZTAYZATTNSNEAXWA7U3HCO2OVQKT5
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3NGHIFUFDPX
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4APHSD5ZX5N4
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7VDA2BCYL4Y
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQUMBKGCAXUA
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/V53P2YOLEQH4J7S5QHXMKMZYFTVVMTMO
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/VT4AF72TJ2XNIKCR4WEBR7URBJJ4YZRD
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/X36Y523UAZY5QFXZAAORNFY63HLBWX7N
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/YILCHHTNLH4GG4GSQBX2MZRKZBXOLCKE
security.gentoo.org / glsa/202008-01
Third Party Advisory
security.netapp.com / advisory/ntap-20200724-0004
Third Party Advisory
usn.ubuntu.com / 4428-1
Third Party Advisory
oracle.com / security-alerts/cpujan2021.html
Third Party Advisory