CVE-2019-20907: Input Validation

Published Dec 10, 2019
·
Updated

A flaw was found in python. In Lib/tarfile.py an attacker is able to craft a TAR archive leading to an infinite loop when opened by tarfile.open, because procpax lacks header validation.

Other sources

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 procpax lacks header validation.

Affected Software

36 affected componentsFixes available
redhat/python<0:2.7.5-90.el7
0:2.7.5-90.el7
redhat/python3<0:3.6.8-18.el7
0:3.6.8-18.el7
redhat/python<0:2.7.5-64.el7_4
0:2.7.5-64.el7_4
redhat/python<0:2.7.5-84.el7_6
0:2.7.5-84.el7_6
redhat/python<0:2.7.5-88.el7_7
0:2.7.5-88.el7_7
redhat/python3<0:3.6.8-31.el8
0:3.6.8-31.el8
redhat/rh-python36-python<0:3.6.12-1.el6
0:3.6.12-1.el6
redhat/rh-python36-python-pip<0:9.0.1-5.el6
0:9.0.1-5.el6
redhat/rh-python36-python-virtualenv<0:15.1.0-3.el6
0:15.1.0-3.el6
redhat/python27-python<0:2.7.18-2.el7
0:2.7.18-2.el7
redhat/python27-python-pip<0:8.1.2-6.el7
0:8.1.2-6.el7
redhat/python27-python-virtualenv<0:13.1.0-4.el7
0:13.1.0-4.el7
redhat/rh-python36-python<0:3.6.12-1.el7
0:3.6.12-1.el7
redhat/rh-python36-python-pip<0:9.0.1-5.el7
0:9.0.1-5.el7
redhat/rh-python36-python-virtualenv<0:15.1.0-3.el7
0:15.1.0-3.el7
redhat/rh-python38-python<0:3.8.6-1.el7
0:3.8.6-1.el7
redhat/rh-python38-python-psutil<0:5.6.4-5.el7
0:5.6.4-5.el7
redhat/rh-python38-python-urllib3<0:1.25.7-6.el7
0:1.25.7-6.el7
Python Python>=3.5.0<3.5.10
Python Python>=3.6.0<3.6.12
Python Python>=3.7.0<3.7.9
Python Python>=3.8.0<3.8.5
openSUSE Leap=15.1
openSUSE Leap=15.2
Debian Debian Linux=9.0
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
NetApp Active Iq Unified Manager Vsphere>=9.5
NetApp Cloud Volumes Ontap Mediator
Oracle ZFS Storage Appliance Kit=8.8
debian/pypy3
7.3.11+dfsg-2+deb12u37.3.19+dfsg-28.0.0+dfsg-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/python to a version that resolves this vulnerability.

    Fixed in 0:2.7.5-90.el7
  2. Upgrade

    Upgrade redhat/python3 to a version that resolves this vulnerability.

    Fixed in 0:3.6.8-18.el7
  3. Upgrade

    Upgrade redhat/python to a version that resolves this vulnerability.

    Fixed in 0:2.7.5-64.el7_4
  4. Upgrade

    Upgrade redhat/python to a version that resolves this vulnerability.

    Fixed in 0:2.7.5-84.el7_6
  5. Upgrade

    Upgrade redhat/python to a version that resolves this vulnerability.

    Fixed in 0:2.7.5-88.el7_7
  6. Upgrade

    Upgrade redhat/python3 to a version that resolves this vulnerability.

    Fixed in 0:3.6.8-31.el8
  7. Upgrade

    Upgrade redhat/rh-python36-python to a version that resolves this vulnerability.

    Fixed in 0:3.6.12-1.el6
  8. Upgrade

    Upgrade redhat/rh-python36-python-pip to a version that resolves this vulnerability.

    Fixed in 0:9.0.1-5.el6
  9. Upgrade

    Upgrade redhat/rh-python36-python-virtualenv to a version that resolves this vulnerability.

    Fixed in 0:15.1.0-3.el6
  10. Upgrade

    Upgrade redhat/python27-python to a version that resolves this vulnerability.

    Fixed in 0:2.7.18-2.el7
  11. Upgrade

    Upgrade redhat/python27-python-pip to a version that resolves this vulnerability.

    Fixed in 0:8.1.2-6.el7
  12. Upgrade

    Upgrade redhat/python27-python-virtualenv to a version that resolves this vulnerability.

    Fixed in 0:13.1.0-4.el7
  13. Upgrade

    Upgrade redhat/rh-python36-python to a version that resolves this vulnerability.

    Fixed in 0:3.6.12-1.el7
  14. Upgrade

    Upgrade redhat/rh-python36-python-pip to a version that resolves this vulnerability.

    Fixed in 0:9.0.1-5.el7
  15. Upgrade

    Upgrade redhat/rh-python36-python-virtualenv to a version that resolves this vulnerability.

    Fixed in 0:15.1.0-3.el7
  16. Upgrade

    Upgrade redhat/rh-python38-python to a version that resolves this vulnerability.

    Fixed in 0:3.8.6-1.el7
  17. Upgrade

    Upgrade redhat/rh-python38-python-psutil to a version that resolves this vulnerability.

    Fixed in 0:5.6.4-5.el7
  18. Upgrade

    Upgrade redhat/rh-python38-python-urllib3 to a version that resolves this vulnerability.

    Fixed in 0:1.25.7-6.el7
  19. Upgrade

    Upgrade debian/pypy3 to a version that resolves this vulnerability.

    Fixed in 7.3.11+dfsg-2+deb12u3Fixed in 7.3.19+dfsg-2Fixed in 8.0.0+dfsg-1
  20. Compensating control

    Do not open untrusted TAR files with Python's tarfile module.

Event History

Dec 10, 2019
CVE Published
12:00 AM
Jul 13, 2020
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via Red Hat·06:33 PM
DescriptionSeverityAffected Software
Nov 21, 2025
Data Sourced
via Ubuntu·09:39 PM
RemedyDescriptionSeverityAffected Software
Feb 21, 2026
Data Sourced
via Launchpad·12:13 AM
Description
Oct 10, 2026
Data Sourced
via Debian·06:06 PM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2019-20907?

CVE-2019-20907 is a vulnerability in Python that allows an attacker to craft a TAR archive leading to an infinite loop when opened by tarfile.open.

2

How severe is CVE-2019-20907?

CVE-2019-20907 has a severity score of 7.5, which is considered high.

3

Which versions of Python are affected by CVE-2019-20907?

Python versions 2.7.5 to 2.7.5-90.el7, 3.6.8 to 3.6.8-18.el7, and 3.8.0 to 3.8.3 are affected by CVE-2019-20907.

4

How can I fix CVE-2019-20907?

To fix CVE-2019-20907, update your Python version to 2.7.5-91.el7, 3.6.8-19.el7, or 3.8.4 or later.

5

Where can I find more information about CVE-2019-20907?

You can find more information about CVE-2019-20907 at the following references: [link 1], [link 2], [link 3].

Company

Resources

Contact

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