CVE-2020-2773 Denial of service in Java

What is CVE-2020-2773?

CVE-2020-2773 is a low-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 15 Apr 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: Security). Supported versions that are affected are Java SE: 7u251, 8u241, 11.0.6 and 14; Java SE Embedded: 8u241. 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 unauthorized ability to cause a partial denial of service (partial DOS) of Java SE, Java SE Embedded. Note: Applies to client and server deployment of Java. This vulnerability can be exploited through sandboxed Java Web Start applications and sandboxed Java applets. It can also be exploited by supplying data to APIs in the specified Component without using sandboxed Java Web Start applications or sandboxed Java applets, such as through a web service. CVSS 3.0 Base Score 3.7 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

Which versions are affected by CVE-2020-2773?

3 open source packages ship an affected version, including java, java-min and jre. It affects 21 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Mcafee Epolicy Orchestrator, Netapp 7-Mode Transition Tool, Netapp Active Iq Unified Manager and 15 more.

How do I fix CVE-2020-2773?

Upgrade java to a fixed version for your release line: 1.7.0, 1.8.0, 7.0.261 or 8.0.251.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-2773 being exploited?

There is no known exploitation of CVE-2020-2773 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-2020-2773, BIT-java-min-2020-2773, BIT-jre-2020-2773, CLEANSTART-2026-SW28811, CLEANSTART-2026-ZE28466, DEBIAN-CVE-2020-2773 and 7 more.