--- title: "CVE-2019-20503\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-2019-20503?format=md keywords: index, follow --- # CVE-2019-20503 Publication date 6 March 2020 Last updated 11 July 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **6.5 · Medium** [Score breakdown](https://ubuntu.com/security/CVE-2019-20503?format=md#impact-score) Toggle side navigation ## Description usrsctp before 2019-12-20 has out-of-bounds reads in sctp\_load\_addresses\_from\_init. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | libusrsctp | 26.04 LTS resolute | Needs evaluation | | 25.10 questing | Ignored end of life, was needs-triage | | 25.04 plucky | Ignored end of life, was needs-triage | | 24.10 oracular | Ignored end of life, was needs-triage | | 24.04 LTS noble | Needs evaluation | | 23.10 mantic | Ignored end of life, was needs-triage | | 23.04 lunar | Ignored end of life, was needs-triage | | 22.10 kinetic | Ignored end of life, was needs-triage | | 22.04 LTS jammy | Needs evaluation | | 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 | Needs evaluation | | 19.10 eoan | Ignored end of life | | 18.04 LTS bionic | Not in release | | 16.04 LTS xenial | Not in release | | 14.04 LTS trusty | Not in release | | chromium-browser | 26.04 LTS resolute | Not affected | | 25.10 questing | Not affected | | 25.04 plucky | Not affected | | 24.10 oracular | Not affected | | 24.04 LTS noble | Not affected | | 23.10 mantic | Not affected | | 23.04 lunar | Not affected | | 22.10 kinetic | Not affected | | 22.04 LTS jammy | Not affected | | 21.10 impish | Not affected | | 21.04 hirsute | Not affected | | 20.10 groovy | Not affected | | 20.04 LTS focal | Not in release | | 19.10 eoan | Not affected | | 18.04 LTS bionic | Fixed 80.0.3987.149-0ubuntu0.18.04.1 | | 16.04 LTS xenial | Fixed 80.0.3987.149-0ubuntu0.16.04.1 | | 14.04 LTS trusty | Not in release | | firefox | 26.04 LTS resolute | Fixed 74.0+build3-0ubuntu1 | | 25.10 questing | Fixed 74.0+build3-0ubuntu1 | | 25.04 plucky | Fixed 74.0+build3-0ubuntu1 | | 24.10 oracular | Fixed 74.0+build3-0ubuntu1 | | 24.04 LTS noble | Fixed 74.0+build3-0ubuntu1 | | 23.10 mantic | Fixed 74.0+build3-0ubuntu1 | | 23.04 lunar | Fixed 74.0+build3-0ubuntu1 | | 22.10 kinetic | Fixed 74.0+build3-0ubuntu1 | | 22.04 LTS jammy | Fixed 74.0+build3-0ubuntu1 | | 21.10 impish | Fixed 74.0+build3-0ubuntu1 | | 21.04 hirsute | Fixed 74.0+build3-0ubuntu1 | | 20.10 groovy | Fixed 74.0+build3-0ubuntu1 | | 20.04 LTS focal | Fixed 74.0+build3-0ubuntu1 | | 19.10 eoan | Fixed 74.0+build3-0ubuntu0.19.10.1 | | 18.04 LTS bionic | Fixed 74.0+build3-0ubuntu0.18.04.1 | | 16.04 LTS xenial | Fixed 74.0+build3-0ubuntu0.16.04.1 | | 14.04 LTS trusty | Not in release | | thunderbird | 26.04 LTS resolute | Fixed 1:68.6.0+build2-0ubuntu1 | | 25.10 questing | Fixed 1:68.6.0+build2-0ubuntu1 | | 25.04 plucky | Fixed 1:68.6.0+build2-0ubuntu1 | | 24.10 oracular | Fixed 1:68.6.0+build2-0ubuntu1 | | 24.04 LTS noble | Fixed 1:68.6.0+build2-0ubuntu1 | | 23.10 mantic | Fixed 1:68.6.0+build2-0ubuntu1 | | 23.04 lunar | Fixed 1:68.6.0+build2-0ubuntu1 | | 22.10 kinetic | Fixed 1:68.6.0+build2-0ubuntu1 | | 22.04 LTS jammy | Fixed 1:68.6.0+build2-0ubuntu1 | | 21.10 impish | Fixed 1:68.6.0+build2-0ubuntu1 | | 21.04 hirsute | Fixed 1:68.6.0+build2-0ubuntu1 | | 20.10 groovy | Fixed 1:68.6.0+build2-0ubuntu1 | | 20.04 LTS focal | Fixed 1:68.6.0+build2-0ubuntu1 | | 19.10 eoan | Fixed 1:68.7.0+build1-0ubuntu0.19.10.1 | | 18.04 LTS bionic | Fixed 1:68.7.0+build1-0ubuntu0.18.04.1 | | 16.04 LTS xenial | Fixed 1:68.7.0+build1-0ubuntu0.16.04.2 | | 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) ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 6.5 · Medium * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | Required | | Scope | Unchanged | | Confidentiality impact | None | | Integrity impact | None | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 6.5 · Medium | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20503) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-20503) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-20503) * [Debian](https://security-tracker.debian.org/tracker/CVE-2019-20503) ### Related Ubuntu Security Notices (USN) + [USN-4328-1](https://usn.ubuntu.com/USN-4328-1) + Thunderbird vulnerabilities + 13 April 2020 + [USN-4299-1](https://usn.ubuntu.com/USN-4299-1) + Firefox vulnerabilities + 11 March 2020 + [USN-4335-1](https://usn.ubuntu.com/USN-4335-1) + Thunderbird vulnerabilities + 21 April 2020 ### Other references * * * *