CVE-2020-2803: Buffer Overflow
A flaw was found in the boundary checks in the java.nio buffer classes in the Libraries component of OpenJDK, where it is bypassed in certain cases. This flaw allows an untrusted Java application or applet o bypass Java sandbox restrictions.
Other sources
An unspecified vulnerability in multiple Oracle products could allow an unauthenticated attacker to take control of the system.
— IBM
It was discovered that the boundary checks in the java.nio Buffer classes in the Libraries component of OpenJDK could be bypassed in certain cases. An untrusted Java application or applet could use this flaw to bypass Java sandbox restrictions.
— Red Hat
Vulnerability in the Java SE, Java SE Embedded product of Oracle Java SE (component: Libraries). 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 require human interaction from a person other than the attacker and while the vulnerability is in Java SE, Java SE Embedded, attacks may significantly impact additional products. 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, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.0 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-openjdk-1:1.8.0.252.b09-2.el6_10 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.7.0-openjdk-1:1.7.0.261-2.6.22.1.el6_10 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.7.1-ibm-1:1.7.1.4.65-1jpp.1.el6_10 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-ibm-1:1.8.0.6.10-1jpp.1.el6_10 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.7.0-openjdk-1:1.7.0.261-2.6.22.2.el7_8 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 11-openjdk-1:11.0.7.10-4.el7_8 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-openjdk-1:1.8.0.252.b09-2.el7_8 - Upgrade
Upgrade
redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-ibm-1:1.8.0.6.10-1jpp.1.el7 - Upgrade
Upgrade
redhat/javato a version that resolves this vulnerability.Fixed in 1.7.1-ibm-1:1.7.1.4.65-1jpp.1.el7 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 11-openjdk-1:11.0.7.10-1.el8_1 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-openjdk-1:1.8.0.252.b09-2.el8_1 - Upgrade
Upgrade
redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-ibm-1:1.8.0.6.10-1.el8_2 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 1.8.0-openjdk-1:1.8.0.252.b09-2.el8_0 - Upgrade
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redhat/javato a version that resolves this vulnerability.Fixed in 11-openjdk-1:11.0.7.10-1.el8_0 - Upgrade
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debian/openjdk-11to a version that resolves this vulnerability.Fixed in 11.0.24+8-2~deb11u1Fixed in 11.0.30+7-1~deb11u1Fixed in 11.0.30+7-1 - Upgrade
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debian/openjdk-8to a version that resolves this vulnerability.Fixed in 8u472-ga-1 - Upgrade
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Oracle Java SE (component: Libraries)to a version that resolves this vulnerability.Fixed in 7u251 - Upgrade
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Oracle Java SE (component: Libraries)to a version that resolves this vulnerability.Fixed in 8u241 - Upgrade
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Oracle Java SE (component: Libraries)to a version that resolves this vulnerability.Fixed in 11.0.6 - Upgrade
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Oracle Java SE (component: Libraries)to a version that resolves this vulnerability.Fixed in 14 - Upgrade
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Oracle Java SE Embedded (component: Libraries)to a version that resolves this vulnerability.Fixed in 8u241 - Compensating control
For affected Java deployments (clients running sandboxed Java Web Start applications or sandboxed Java applets that load and run untrusted code), ensure only trusted code is loaded and executed; this vulnerability does not apply to deployments (typically servers) that load and run only trusted code installed by an administrator.
Event History
Parent advisories
This vulnerability appears in the following advisories.
Frequently Asked Questions
What is CVE-2020-2803?
CVE-2020-2803 is a vulnerability in the Java SE and Java SE Embedded product of Oracle Java SE that allows an unauthenticated attacker with network access.
Which versions of Java SE are affected by CVE-2020-2803?
The affected versions of Java SE are 7u251, 8u241, 11.0.6, and 14.
Which versions of Java SE Embedded are affected by CVE-2020-2803?
The affected version of Java SE Embedded is 8u241.
What is the severity of CVE-2020-2803?
The severity of CVE-2020-2803 is high with a severity value of 7.
How can I fix CVE-2020-2803 vulnerability?
To fix the CVE-2020-2803 vulnerability, update to the following versions: Java SE 7u252, 8u252, 11.0.7, and 14.0.1.