What is CVE-2021-2309?

CVE-2021-2309 is a vulnerability in Oracle VirtualBox that allows a high privileged attacker to execute a heap-based buffer overflow and escalate privileges.

What is the severity of CVE-2021-2309?

The severity of CVE-2021-2309 is high with a CVSS score of 7.5.

What software is affected by CVE-2021-2309?

Oracle VM VirtualBox versions prior to 6.1.20 are affected by CVE-2021-2309.

How can CVE-2021-2309 be exploited?

CVE-2021-2309 can be exploited by a high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes.

How can I fix CVE-2021-2309?

To fix CVE-2021-2309, it is recommended to upgrade Oracle VM VirtualBox to version 6.1.20 or later.

Vulnerability/
CVE-2021-2309

high

7.5

22/4/2021

3/8/2024

26/9/2024

CVE-2021-2309: Oracle VirtualBox VMSVGA Heap-based Buffer Overflow Privilege Escalation Vulnerability

First published: Thu Apr 22 2021(Updated: )

This vulnerability allows local attackers to escalate privileges on affected installations of Oracle VirtualBox. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the VGA component. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.

Credit: secalert_us@oracle.com

Affected Software	Affected Version	How to fix
Oracle VirtualBox
Oracle VM VirtualBox	<6.1.20

Remedy

https://www.oracle.com/security-alerts/cpuapr2021.html

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Reference Links

Frequently Asked Questions

What is CVE-2021-2309?
CVE-2021-2309 is a vulnerability in Oracle VirtualBox that allows a high privileged attacker to execute a heap-based buffer overflow and escalate privileges.
What is the severity of CVE-2021-2309?
The severity of CVE-2021-2309 is high with a CVSS score of 7.5.
What software is affected by CVE-2021-2309?
Oracle VM VirtualBox versions prior to 6.1.20 are affected by CVE-2021-2309.
How can CVE-2021-2309 be exploited?
CVE-2021-2309 can be exploited by a high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes.
How can I fix CVE-2021-2309?
To fix CVE-2021-2309, it is recommended to upgrade Oracle VM VirtualBox to version 6.1.20 or later.

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