# CVE-2019-5010: Python 3.6 and 2 others: NULL Pointer Dereference

CVE-2019-5010 is fixed in 25 products on 2 platforms, first by Python 3.7 3.7.3, released March 25, 2019. 2 other affected products have no fix yet. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2019-5010
- Priority: High
- CVSS: 7.5 (Moderate)
- EPSS: 0.2074
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 17, 2019
- Weakness: CWE-476: NULL Pointer Dereference
- Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2019-5010

## Description

An exploitable denial-of-service vulnerability exists in the X509 certificate parser of Python.org Python 2.7.11 / 3.6.6. A specially crafted X509 certificate can cause a NULL pointer dereference, resulting in a denial of service. An attacker can initiate or accept TLS connections using crafted certificates to trigger this vulnerability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Python 3.7 | 3.7.3 | [Python 3.7 3.7.3](https://patchblox.com/security/data/fix/windows-app/python.python.3.7-3.7.3.md) | Mar 25, 2019 |
| Linux | idle-python2.7 Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [idle-python2.7 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-idle-python2.7-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | idle-python3.6 Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [idle-python3.6 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-idle-python3.6-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | libpython2.7 Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [libpython2.7 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython2.7-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | libpython2.7-minimal Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [libpython2.7-minimal 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython2.7-minimal-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | libpython2.7-stdlib Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [libpython2.7-stdlib 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython2.7-stdlib-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | libpython2.7-testsuite Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [libpython2.7-testsuite 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython2.7-testsuite-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | libpython3.6 Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [libpython3.6 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython3.6-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | libpython3.6-minimal Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [libpython3.6-minimal 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython3.6-minimal-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | libpython3.6-stdlib Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [libpython3.6-stdlib 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython3.6-stdlib-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | libpython3.6-testsuite Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [libpython3.6-testsuite 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libpython3.6-testsuite-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | platform-python RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | platform-python ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | platform-python-debug RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | platform-python-debug ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | platform-python-devel RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | platform-python-devel ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | python2.7 Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [python2.7 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python2.7-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | python2.7-examples Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [python2.7-examples 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python2.7-examples-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | python2.7-minimal Ubuntu 18.04.6 LTS (bionic) | 2.7.15-4ubuntu4~18.04.1 | [python2.7-minimal 2.7.15-4ubuntu4~18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python2.7-minimal-2.7.15-4ubuntu4-18.04.1.md) | Jul 12, 2019 |
| Linux | python3-idle RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | python3-idle ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | python3-libs RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | python3-libs ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | python3-test RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | python3-test ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | python3-tkinter RHEL 8 | 0:3.6.8-15.1.el8 | [RHSA-2019:3520](https://patchblox.com/security/data/fix/linux/rhsa-2019-3520.md) | Nov 5, 2019 |
| Linux | python3-tkinter ol 8 | 0:3.6.8-15.1.0.1.el8 | [ELSA-2019-3520](https://patchblox.com/security/data/fix/linux/elsa-2019-3520.md) | Nov 14, 2019 |
| Linux | python3.6 Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [python3.6 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3.6-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | python3.6-examples Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [python3.6-examples 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3.6-examples-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | python3.6-minimal Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [python3.6-minimal 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3.6-minimal-3.6.8-1-18.04.2.md) | Jul 12, 2019 |
| Linux | python3.6-venv Ubuntu 18.04.6 LTS (bionic) | 3.6.8-1~18.04.2 | [python3.6-venv 3.6.8-1~18.04.2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-python3.6-venv-3.6.8-1-18.04.2.md) | Jul 12, 2019 |

## No fix yet

| Platform | Product | Status |
|---|---|---|
| Windows apps | Python 3.5 | no-fix |
| Windows apps | Python 3.6 | no-fix |

---

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