Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the…
Priority MEDIUM 47CWE-330Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 15 fixed, 6 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.12706 96th percentileScored 2026-11-07
Fix Partial Red Hat: 5 advisoriesRed Hat: 15 fixed, 6 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | 3.0.0 to before 3.5.10; 3.6.0 to before 3.6.12; 3.7.0 to before 3.7.9; 3.8.0 to before 3.8.4 | Vulnerable | python-pillow |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* | 15.2 | Vulnerable | openSUSE |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* | 32 | Vulnerable | Fedoraproject |
| cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* | 12.4.0.0 | Vulnerable | Oracle |
- cpe:2.3:a:python:python:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.5.10; 3.6.0 to before 3.6.12; 3.7.0 to before 3.7.9; 3.8.0 to before 3.8.4 Vulnerable ·python-pillow
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
- cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* Versions 12.4.0.0 Vulnerable ·Oracle
Remediation
Red Hat 5 advisories
- RHSA-2020:5010 Released 2020-11-10 · Red Hat rating Moderatepython3 security update
- Red Hat Enterprise Linux Client (v. 7) python3-3.6.8-18.el7, python3-libs-3.6.8-18.el7
- Red Hat Enterprise Linux Client Optional (v. 7) python3-3.6.8-18.el7, python3-debug-3.6.8-18.el7, python3-devel-3.6.8-18.el7 +3
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) python3-3.6.8-18.el7, python3-debug-3.6.8-18.el7, python3-devel-3.6.8-18.el7 +3
- Red Hat Enterprise Linux Server (v. 7) python3-3.6.8-18.el7, python3-libs-3.6.8-18.el7, python3-libs-3.6.8-18.el7.ppc
- Red Hat Enterprise Linux Server Optional (v. 7) python3-3.6.8-18.el7, python3-3.6.8-18.el7.ppc, python3-debug-3.6.8-18.el7 +9
- Red Hat Enterprise Linux Workstation (v. 7) python3-3.6.8-18.el7, python3-libs-3.6.8-18.el7
- Red Hat Enterprise Linux Workstation Optional (v. 7) python3-3.6.8-18.el7, python3-debug-3.6.8-18.el7, python3-devel-3.6.8-18.el7 +3
- RHSA-2020:4641 Released 2020-11-04 · Red Hat rating Moderatepython38:3.8 security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) Cython-0.29.14-4.module+el8.2.0+5234+f98739b6.src::python38:3.8, PyYAML-5.3.1-1.module+el8.3.0+7187+a27ec44b.src::python38:3.8, babel-2.7.0-10.module+el8.2.0+5234+f98739b6.src::python38:3.8 +47
- RHSA-2020:4433 Released 2020-11-04 · Red Hat rating Moderatepython3 security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) platform-python-3.6.8-31.el8, platform-python-debug-3.6.8-31.el8, platform-python-devel-3.6.8-31.el8 +3
- Red Hat Enterprise Linux BaseOS (v. 8) platform-python-3.6.8-31.el8, python3-3.6.8-31.el8, python3-libs-3.6.8-31.el8 +1
Show 2 more Red Hat advisories
- RHSA-2020:4299 Released 2020-10-20 · Red Hat rating Moderaterh-python38 security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python38-python-3.8.6-1.el7, rh-python38-python-debug-3.8.6-1.el7, rh-python38-python-devel-3.8.6-1.el7 +8
- RHSA-2020:4285 Released 2020-10-19 · Red Hat rating Moderaterh-python36 security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) rh-python36-python-3.6.12-1.el6, rh-python36-python-debug-3.6.12-1.el6, rh-python36-python-devel-3.6.12-1.el6 +6
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) rh-python36-python-3.6.12-1.el7, rh-python36-python-debug-3.6.12-1.el7, rh-python36-python-devel-3.6.12-1.el7 +6
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 5 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Quay 3 | Affected | No fix planned: Will not fix |
| Red Hat Software Collections | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:4433, RHSA-2020:4641 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2020:4433 |
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2020:5010 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2020:4285 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2020:4285, RHSA-2020:4299 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2020:4285, RHSA-2020:4299 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) | Fixed | RHSA-2020:4285, RHSA-2020:4299 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2020:4285 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2020:4285, RHSA-2020:4299 |
Not affected: 1 product
- Red Hat Enterprise Linux 8
Timeline
- 2026-10-02 Threatist record created from CVE-2020-14422
- 2026-10-03 Alias added: GHSA-9gg6-cm3f-wf38
- 2026-10-08 CISA SSVC decision points changed
References
Advisory 23
- https://bugs.python.org/issue41004
- https://github.com/python/cpython/pull/20956
- openSUSE-SU-2020:0931
- openSUSE-SU-2020:0940
- [debian-lts-announce] 20200715 [SECURITY] [DLA 2280-1] python3.5 security update
- FEDORA-2020-b513391ca8
- FEDORA-2020-705c6ea5be
- openSUSE-SU-2020:0989
- openSUSE-SU-2020:1002
- FEDORA-2020-dfb11916cc
- USN-4428-1
- FEDORA-2020-c3b07cc5c9
- FEDORA-2020-bb919e575e
- GLSA-202008-01
- FEDORA-2020-1ddd5273d6
- FEDORA-2020-87c0a0a52d
- FEDORA-2020-efb908b6a8
- FEDORA-2020-d808fdd597
- FEDORA-2020-982b2950db
- FEDORA-2020-c539babb0a
- FEDORA-2020-d30881c970
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://security.netapp.com/advisory/ntap-20200724-0004/
Sources
- CVE-2020-14422 · CVE Program
- CVE-2020-14422 · NVD
- FIRST EPSS
- GHSA-9gg6-cm3f-wf38 · GitHub Advisory Database · CC BY 4.0
- CVE-2020-14422 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences