In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.02985.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Canonical Subscribe
Ubuntu Linux Subscribe
Debian Subscribe
Debian Linux Subscribe
Fedoraproject Subscribe
Fedora Subscribe
Netapp Subscribe
Active Iq Unified Manager Subscribe
Cloud Volumes Ontap Mediator Subscribe
Opensuse Subscribe
Leap Subscribe
Oracle Subscribe
Zfs Storage Appliance Kit Subscribe
Python Subscribe
Python Subscribe
Redhat Subscribe
Enterprise Linux Subscribe
Openshift Do Subscribe
Rhel Aus Subscribe
Rhel E4s Subscribe
Rhel Eus Subscribe
Rhel Software Collections Subscribe
Rhel Tus Subscribe

Configuration 1 [-]

OR cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

Configuration 2 [-]

OR cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*

Configuration 3 [-]

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration 4 [-]

OR cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

Configuration 5 [-]

OR cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*

Configuration 6 [-]

OR cpe:2.3:a:netapp:active_iq_unified_manager:*:*:*:*:*:vsphere:*:*
cpe:2.3:a:netapp:cloud_volumes_ontap_mediator:-:*:*:*:*:*:*:*

Configuration 7 [-]

cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*
Package CPE Advisory Released Date
Red Hat Enterprise Linux 7
python-0:2.7.5-90.el7 cpe:/o:redhat:enterprise_linux:7 RHSA-2020:5009 2020-11-10T00:00:00Z
python3-0:3.6.8-18.el7 cpe:/o:redhat:enterprise_linux:7 RHSA-2020:5010 2020-11-10T00:00:00Z
Red Hat Enterprise Linux 7.4 Advanced Update Support
python-0:2.7.5-64.el7_4 cpe:/o:redhat:rhel_aus:7.4 RHSA-2021:0761 2021-03-09T00:00:00Z
Red Hat Enterprise Linux 7.4 Telco Extended Update Support
python-0:2.7.5-64.el7_4 cpe:/o:redhat:rhel_tus:7.4 RHSA-2021:0761 2021-03-09T00:00:00Z
Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
python-0:2.7.5-64.el7_4 cpe:/o:redhat:rhel_e4s:7.4 RHSA-2021:0761 2021-03-09T00:00:00Z
Red Hat Enterprise Linux 7.6 Extended Update Support
python-0:2.7.5-84.el7_6 cpe:/o:redhat:rhel_eus:7.6 RHSA-2021:0881 2021-03-16T00:00:00Z
Red Hat Enterprise Linux 7.7 Extended Update Support
python-0:2.7.5-88.el7_7 cpe:/o:redhat:rhel_eus:7.7 RHSA-2021:0528 2021-02-16T00:00:00Z
Red Hat Enterprise Linux 8
python3-0:3.6.8-31.el8 cpe:/a:redhat:enterprise_linux:8 RHSA-2020:4433 2020-11-04T00:00:00Z
python38:3.8-8030020200818121840.4190259b cpe:/a:redhat:enterprise_linux:8 RHSA-2020:4641 2020-11-04T00:00:00Z
python27:2.7-8030020200819165638.851f4228 cpe:/a:redhat:enterprise_linux:8 RHSA-2020:4654 2020-11-04T00:00:00Z
python3-0:3.6.8-31.el8 cpe:/o:redhat:enterprise_linux:8 RHSA-2020:4433 2020-11-04T00:00:00Z
Red Hat OpenShift Do
openshiftdo/odo-init-image-rhel7:1.1.3-2 cpe:/a:redhat:openshift_do:1.0::el7 RHSA-2021:0949 2021-03-22T00:00:00Z
Red Hat Software Collections for Red Hat Enterprise Linux 6
rh-python36-python-0:3.6.12-1.el6 cpe:/a:redhat:rhel_software_collections:3::el6 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-pip-0:9.0.1-5.el6 cpe:/a:redhat:rhel_software_collections:3::el6 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-virtualenv-0:15.1.0-3.el6 cpe:/a:redhat:rhel_software_collections:3::el6 RHSA-2020:4285 2020-10-19T00:00:00Z
Red Hat Software Collections for Red Hat Enterprise Linux 7
python27-python-0:2.7.18-2.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-pip-0:8.1.2-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-virtualenv-0:13.1.0-4.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
rh-python36-python-0:3.6.12-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-pip-0:9.0.1-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-virtualenv-0:15.1.0-3.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python38-python-0:3.8.6-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-psutil-0:5.6.4-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-urllib3-0:1.25.7-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
python27-python-0:2.7.18-2.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-pip-0:8.1.2-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-virtualenv-0:13.1.0-4.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
rh-python36-python-0:3.6.12-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-pip-0:9.0.1-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-virtualenv-0:15.1.0-3.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python38-python-0:3.8.6-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-psutil-0:5.6.4-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-urllib3-0:1.25.7-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS
python27-python-0:2.7.18-2.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-pip-0:8.1.2-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
python27-python-virtualenv-0:13.1.0-4.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4273 2020-10-20T00:00:00Z
rh-python36-python-0:3.6.12-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-pip-0:9.0.1-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python36-python-virtualenv-0:15.1.0-3.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4285 2020-10-19T00:00:00Z
rh-python38-python-0:3.8.6-1.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-psutil-0:5.6.4-5.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z
rh-python38-python-urllib3-0:1.25.7-6.el7 cpe:/a:redhat:rhel_software_collections:3::el7 RHSA-2020:4299 2020-10-20T00:00:00Z

No data.

Advisories
Source ID Title
Debian DLA Debian DLA DLA-2337-1 python2.7 security update
Debian DLA Debian DLA DLA-2456-1 python3.5 security update
Debian DLA Debian DLA DLA-3432-1 python2.7 security update
EUVD EUVD EUVD-2019-11441 In Lib/tarfile.py in Python through 3.8.3, an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because _proc_pax lacks header validation.
Ubuntu USN Ubuntu USN USN-4428-1 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-4754-3 Python vulnerabilities
Ubuntu USN Ubuntu USN USN-6891-1 Python vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00051.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00052.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00053.html cve-icon cve-icon
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00056.html cve-icon cve-icon
https://bugs.python.org/issue39017 cve-icon cve-icon
https://github.com/python/cpython/pull/21454 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2020/08/msg00034.html cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2020/11/msg00032.html cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2023/05/msg00024.html cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36XI3EEQNMHGOZEI63Y7UV6XZRELYEAU/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CAXHCY4V3LPAAJOBCJ26ISZ4NUXQXTUZ/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CNHPQGSP2YM3JAUD2VAMPXTIUQTZ2M2U/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CTUNTBJ3POHONQOTLEZC46POCIYYTAKZ/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LE4O3PNDNNOMSKHNUKZKD3NGHIFUFDPX/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NTBKKOLFFNHG6CM4ACDX4APHSD5ZX5N4/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OXI72HIHMXCQFWTULUXDG7VDA2BCYL4Y/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDKKRXLNVXRF6VGERZSR3OMQR5D5QI6I/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TOGKLGTXZLHQQFBVCAPSUDA6DOOJFNRY/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V3TALOUBYU2MQD4BPLRTDQUMBKGCAXUA/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V53P2YOLEQH4J7S5QHXMKMZYFTVVMTMO/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VT4AF72TJ2XNIKCR4WEBR7URBJJ4YZRD/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YILCHHTNLH4GG4GSQBX2MZRKZBXOLCKE/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YSL3XWVDMSMKO23HR74AJQ6VEM3C2NTS/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-20907 cve-icon
https://security.gentoo.org/glsa/202008-01 cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20200731-0002/ cve-icon cve-icon
https://usn.ubuntu.com/4428-1/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-20907 cve-icon
https://www.oracle.com/security-alerts/cpujan2021.html cve-icon cve-icon
History

Wed, 07 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-07T17:59:38.830Z

Reserved: 2020-07-13T00:00:00.000Z

Link: CVE-2019-20907

cve-icon Vulnrichment

Updated: 2024-08-05T02:53:09.456Z

cve-icon NVD

Status : Modified

Published: 2020-07-13T13:15:10.763

Modified: 2026-10-07T18:17:08.517

Link: CVE-2019-20907

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-12-10T00:00:00Z

Links: CVE-2019-20907 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses