CVE-2020-2604 Deserialization in Java

What is CVE-2020-2604?

CVE-2020-2604 is a high-severity unsafe deserialization vulnerability in Canonical Ubuntu Linux, published on 15 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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).

Weakness: CWE-502

Which versions are affected by CVE-2020-2604?

3 open source packages ship an affected version, including java, java-min and jre. It affects 27 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Mcafee Epolicy Orchestrator, Netapp Active Iq Unified Manager, Netapp E-Series Performance Analyzer, Netapp E-Series Santricity Management Plug-Ins and 21 more.

How do I fix CVE-2020-2604?

Upgrade java to a fixed version for your release line: 1.7.0, 1.8.0, 7.0.251 or 8.0.241.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2020-2604 being exploited?

There is no known exploitation of CVE-2020-2604 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-java-2020-2604, BIT-java-min-2020-2604, BIT-jre-2020-2604, CLEANSTART-2026-DD93131, CLEANSTART-2026-YN02098, DEBIAN-CVE-2020-2604 and 7 more.