--- title: "CVE-2019-20907\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2019-20907?format=md keywords: index, follow --- # CVE-2019-20907 Publication date 13 July 2020 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **7.5 · High** [Score breakdown](https://ubuntu.com/security/CVE-2019-20907?format=md#impact-score) Toggle side navigation ## Description 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. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | python2.7 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not affected | | 22.04 LTS jammy | Not affected | | 21.10 impish | Ignored end of life | | 21.04 hirsute | Ignored end of life | | 20.10 groovy | Ignored end of life | | 20.04 LTS focal | Fixed 2.7.18-1~20.04.1 | | 19.10 eoan | Ignored end of life | | 18.04 LTS bionic | Fixed 2.7.17-1~18.04ubuntu1.1 | | 16.04 LTS xenial | Fixed 2.7.12-1ubuntu0~16.04.12 | | 14.04 LTS trusty | Fixed 2.7.6-8ubuntu0.6+esm6 Ubuntu Pro | | python3.4 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Fixed 3.4.3-1ubuntu1~14.04.7+esm7 Ubuntu Pro | | python3.5 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Fixed 3.5.2-2ubuntu0~16.04.11 | | 14.04 LTS trusty | Fixed 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 Ubuntu Pro | | python3.6 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not in release | | 18.04 LTS bionic | Fixed 3.6.9-1~18.04ubuntu1.1 | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | python3.7 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not in release | | 20.04 LTS focal | Not in release | | 19.10 eoan | Ignored end of life | | 18.04 LTS bionic | Fixed 3.7.5-2ubuntu1~18.04.2+esm3 Ubuntu Pro | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | python3.8 | 24.10 oracular | Not in release | | 24.04 LTS noble | Not in release | | 23.10 mantic | Not in release | | 23.04 lunar | Not in release | | 22.10 kinetic | Not in release | | 22.04 LTS jammy | Not in release | | 21.10 impish | Not in release | | 21.04 hirsute | Not in release | | 20.10 groovy | Not affected | | 20.04 LTS focal | Fixed 3.8.2-1ubuntu1.2 | | 19.10 eoan | Ignored end of life | | 18.04 LTS bionic | Fixed 3.8.0-3ubuntu1~18.04.2+esm2 Ubuntu Pro | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2019-20907?format=md#patch-details) ### Get expanded security coverage with Ubuntu Pro Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use. [Get Ubuntu Pro](https://ubuntu.com/pro) [30-day free trial](https://ubuntu.com/pro/free-trial) ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | python3.6 | * Upstream: [47a2955](https://github.com/python/cpython/commit/47a2955589bdb1a114d271496ff803ad73f954b8) | | python3.7 | * Upstream: [79c6b60](https://github.com/python/cpython/commit/79c6b602efc9a906c8496f3d5f4d54c54b48fa06) | | python3.8 | * Upstream: [c554795](https://github.com/python/cpython/commit/c55479556db015f48fc8bbca17f64d3e65598559) | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 7.5 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | None | | Integrity impact | None | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 7.5 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20907) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-20907) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-20907) * [Debian](https://security-tracker.debian.org/tracker/CVE-2019-20907) ### Related Ubuntu Security Notices (USN) + [USN-4428-1](https://usn.ubuntu.com/USN-4428-1) + Python vulnerabilities + 22 July 2020 + [USN-4754-3](https://usn.ubuntu.com/USN-4754-3) + Python vulnerabilities + 12 March 2021 + [USN-6891-1](https://usn.ubuntu.com/USN-6891-1) + Python vulnerabilities + 11 July 2024 ### Other references * * *