--- title: "CVE-2020-2604\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-2020-2604?format=md keywords: index, follow --- # CVE-2020-2604 Publication date 27 January 2020 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **8.1 · High** [Score breakdown](https://ubuntu.com/security/CVE-2020-2604?format=md#impact-score) Toggle side navigation ## Description Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Serialization). Supported versions that are affected are Java SE: 7u241, 8u231, 11.0.5 and 13.0.1; Java SE Embedded: 8u231. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Java SE, Java SE Embedded. Successful attacks of this vulnerability can result in takeover of Java SE, Java SE Embedded. Note: This vulnerability applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets (in Java SE 8), that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS v3.0 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H). ### From the Ubuntu Security Team It was discovered that OpenJDK incorrectly handled serialization filter. An attacker could possibly use this issue to bypass the intended filter during serialization. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | icedtea-web | 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 affected | | 19.10 eoan | Not affected | | 18.04 LTS bionic | Not affected | | 16.04 LTS xenial | Not affected | | 14.04 LTS trusty | Not in release | | openjdk-12 | 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 | Not in release | | openjdk-13 | 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 | Not affected | | 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 | | openjdk-8 | 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 affected | | 19.10 eoan | Fixed 8u242-b08-0ubuntu3~19.10 | | 18.04 LTS bionic | Fixed 8u242-b08-0ubuntu3~18.04 | | 16.04 LTS xenial | Fixed 8u242-b08-0ubuntu3~16.04 | | 14.04 LTS trusty | Not in release | | openjdk-9 | 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 | Ignored end of standard support, was needs-triage | | 14.04 LTS trusty | Not in release | | openjdk-lts | 23.04 lunar | Fixed 11.0.6+10-1ubuntu1 | | 22.10 kinetic | Fixed 11.0.6+10-1ubuntu1 | | 22.04 LTS jammy | Fixed 11.0.6+10-1ubuntu1 | | 21.10 impish | Fixed 11.0.6+10-1ubuntu1 | | 21.04 hirsute | Fixed 11.0.6+10-1ubuntu1 | | 20.10 groovy | Fixed 11.0.6+10-1ubuntu1 | | 20.04 LTS focal | Fixed 11.0.6+10-1ubuntu1 | | 19.10 eoan | Fixed 11.0.6+10-1ubuntu1~19.10.1 | | 18.04 LTS bionic | Fixed 11.0.6+10-1ubuntu1~18.04.1 | | 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) ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 8.1 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | High | | Privileges required | None | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | High | | Integrity impact | High | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 8.1 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-2604) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-2604) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-2604) * [Debian](https://security-tracker.debian.org/tracker/CVE-2020-2604) ### Related Ubuntu Security Notices (USN) + [USN-4257-1](https://usn.ubuntu.com/USN-4257-1) + OpenJDK vulnerabilities + 28 January 2020 ### Other references * *