CVE-2020-14422: Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow a
Noroxi assessment
Priority: Monitor (action score 27/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 12.7% (FIRST EPSS); higher than 96.2% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: python38-asn1crypto (AlmaLinux:8) 1.2.0-3.module_el8.6.0+2778+cd494b30; python38-cffi (AlmaLinux:8) 1.13.2-3.module_el8.6.0+2778+cd494b30; python38-chardet (AlmaLinux:8) 3.0.4-19.module_el8.6.0+2778+cd494b30.
- Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to python38-asn1crypto (AlmaLinux:8) 1.2.0-3.module_el8.6.0+2778+cd494b30; python38-cffi (AlmaLinux:8) 1.13.2-3.module_el8.6.0+2778+cd494b30; python38-chardet (AlmaLinux:8) 3.0.4-19.module_el8.6.0+2778+cd494b30 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- BDU:2021-00757
- ALSA-2020:4641
- DLA-2280-1
- DLA-3424-1
- openSUSE-SU-2020:0931-1
- openSUSE-SU-2020:0940-1
- openSUSE-SU-2020:0989-1
- openSUSE-SU-2020:1002-1
- openSUSE-SU-2020:2332-1
- openSUSE-SU-2020:2333-1
- RHSA-2020:4285
- RHSA-2020:4299
- RHSA-2020:4433
- RHSA-2020:4641
- RHSA-2020:5010
- RLSA-2020:4641
- SUSE-SU-2020:1822-1
- SUSE-SU-2020:1920-1
- SUSE-SU-2020:1939-1
- SUSE-SU-2020:1940-1
- Published
- Jun 18, 2020
- Updated
- Oct 14, 2026
- EPSS
- 12.7% · 96th percentile
- CWE
- CWE-330
Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 23 / 40 · 5.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 4 / 30 · 12.7%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| python | python | cpe:2.3:a:python:python |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
| fedoraproject | fedora | cpe:2.3:o:fedoraproject:fedora |
| oracle | enterprise manager ops center | cpe:2.3:a:oracle:enterprise_manager_ops_center |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- fedoraproject fedora31
- fedoraproject fedora32
- opensuse leap15.1
- opensuse leap15.2
- oracle enterprise manager ops center12.4.0.0
- python python3.8.0 and later · before 3.8.4
- python python3.7.0 and later · before 3.7.9
- python python3.6.0 and later · before 3.6.12
- python python3.0.0 and later · before 3.5.10
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:8 | python38-asn1crypto | before 1.2.0-3.module_el8.6.0+2778+cd494b30 | 1.2.0-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-cffi | before 1.13.2-3.module_el8.6.0+2778+cd494b30 | 1.13.2-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-chardet | before 3.0.4-19.module_el8.6.0+2778+cd494b30 | 3.0.4-19.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-cryptography | before 2.8-3.module_el8.6.0+2778+cd494b30 | 2.8-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-Cython | before 0.29.14-4.module_el8.6.0+2778+cd494b30 | 0.29.14-4.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-idna | before 2.8-6.module_el8.6.0+2778+cd494b30 | 2.8-6.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-markupsafe | before 1.1.1-6.module_el8.6.0+2778+cd494b30 | 1.1.1-6.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-mod_wsgi | before 4.6.8-3.module_el8.6.0+2778+cd494b30 | 4.6.8-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-psycopg2 | before 2.8.4-4.module_el8.6.0+2778+cd494b30 | 2.8.4-4.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-psycopg2-doc | before 2.8.4-4.module_el8.6.0+2778+cd494b30 | 2.8.4-4.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-psycopg2-tests | before 2.8.4-4.module_el8.6.0+2778+cd494b30 | 2.8.4-4.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-pycparser | before 2.19-3.module_el8.6.0+2778+cd494b30 | 2.19-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-pysocks | before 1.7.1-4.module_el8.6.0+2778+cd494b30 | 1.7.1-4.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-pytz | before 2019.3-3.module_el8.6.0+2778+cd494b30 | 2019.3-3.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-requests | before 2.22.0-9.module_el8.6.0+2778+cd494b30 | 2.22.0-9.module_el8.6.0+2778+cd494b30 |
| AlmaLinux:8 | python38-scipy | before 1.3.1-4.module_el8.6.0+2778+cd494b30 | 1.3.1-4.module_el8.6.0+2778+cd494b30 |
| Alpine:v3.10 | python3 | before 3.7.7-r1 | 3.7.7-r1 |
| Alpine:v3.11 | python3 | before 3.8.2-r1 | 3.8.2-r1 |
| Alpine:v3.12 | python3 | before 3.8.4-r0 | 3.8.4-r0 |
| Alpine:v3.9 | python3 | before 3.6.9-r3 | 3.6.9-r3 |
| Debian:10 | python-ipaddress | before 1.0.17-1+deb10u1 | 1.0.17-1+deb10u1 |
| Debian:11 | python-ipaddress | from 0 | — |
| Debian:9 | python3.5 | before 3.5.3-1+deb9u2 | 3.5.3-1+deb9u2 |
| openSUSE:Leap 15.1 | python-ipaddress | before 1.0.18-lp151.3.3.1 | 1.0.18-lp151.3.3.1 |
+96
Same product
python: all recordsOther highest-scoring records for the same primary product.
- CVE-2016-5636Integer overflow in the get_data function in zipimport.c in CPython (aka Python) before 2.7.12, 3.x before 3.4.5, and 3.5.x before 3.5.2 all47Plan
- CVE-2007-4559Directory traversal vulnerability in the (1) extract and (2) extractall functions in the tarfile module in Python allows user-assisted remot47Plan
- CVE-2021-3177Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Pyth46Plan
Published before and after this one in the same product
- ← EarlierCVE-2014-4650Feb 20, 2020 · The CGIHTTPServer module in Python 2.7.5 and 3.3.4 does not properly handle URLs in which URL encoding is used for path separators, which al46Plan
- ← EarlierCVE-2013-1753Mar 11, 2020 · The gzip_decode function in the xmlrpc client library in Python 3.4 and earlier allows remote attackers to cause a denial of service (memory31Monitor
- Later →CVE-2020-15523Jul 4, 2020 · In Python 3.6 through 3.6.10, 3.7 through 3.7.8, 3.8 through 3.8.4rc1, and 3.9 through 3.9.0b4 on Windows, a Trojan horse python3.dll might 31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:python38-asn1crypto | 1.2.0-3.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-cffi | 1.13.2-3.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-chardet | 3.0.4-19.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-cryptography | 2.8-3.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-Cython | 0.29.14-4.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-idna | 2.8-6.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-markupsafe | 1.1.1-6.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-mod_wsgi | 4.6.8-3.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-psycopg2 | 2.8.4-4.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-psycopg2-doc | 2.8.4-4.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-psycopg2-tests | 2.8.4-4.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:python38-pycparser | 2.19-3.module_el8.6.0+2778+cd494b30 · AlmaLinux:8 | Package registry (OSV) |
| alpine:python3 | 3.7.7-r1 · Alpine:v3.10 | Package registry (OSV) |
| debian:python-ipaddress | 1.0.17-1+deb10u1 · Debian:10 | Package registry (OSV) |
| debian:python3.5 | 3.5.3-1+deb9u2 · Debian:9 | Package registry (OSV) |
| opensuse:python-ipaddress | 1.0.18-lp151.3.3.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:python3 | 3.6.10-lp151.6.21.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:python3-base | 3.6.10-lp151.6.21.1 · openSUSE:Leap 15.1 | Package registry (OSV) |
| opensuse:python3-core | 3.6.12-lp152.4.14.1 · openSUSE:Leap 15.2 | Package registry (OSV) |
| opensuse:python3-doc | 3.6.10-lp152.4.3.1 · openSUSE:Leap 15.2 | Package registry (OSV) |
| opensuse:python3-documentation | 3.6.12-lp152.4.14.1 · openSUSE:Leap 15.2 | Package registry (OSV) |
| red hat:rh-python36-python | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-debug | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-debuginfo | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-devel | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-libs | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-pip | 0:9.0.1-5.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-test | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-tkinter | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
| red hat:rh-python36-python-tools | 0:3.6.12-1.el6 · Red Hat:rhel_software_collections:3::el6 | Package registry (OSV) |
+22
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-20-773 · Sep 22, 2020(Python için Güvenlik Güncellemeleri Yayınladı)
- TR-20-612 · Aug 14, 2020(Python için Güvenlik Güncellemeleri Yayınladı)
- TR-20-535 · Jul 16, 2020(Python için Güvenlik Güncellemeleri Yayınladı)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-330 · Use of Insufficiently Random ValuesCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00006.html
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00032.html
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00041.html
- bugs.python.org/issue41004
- github.com/python/cpython/pull/20956
- lists.debian.org/debian-lts-announce/2020/07/msg00011.html
- 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/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.