Everything you should know about the CurveBall Bug

2020 has brought some fantastic as well as drastic things with it and one of these drastic things is the “CurveBall” bug. This came as a shocking threat in the security world and was submitted by the National Security Administration (NSA) to Microsoft. It came in with a fix for CVE-2020-0601 introduced in Microsoft’s first patch. Although initially, this bug was not easy to figure out, later on, it came with a bang. It weakens the entire idea of assurance that we trust to secure web sites and authenticate files.

The liability of this bug depends on ECC (Elliptic Curve Cryptography). It is one of the known methods for digitally signing certificates. This method uses values that help in the production of public as well as private keys. These keys are then used for the exchange of information in a trusted way. ECC gives us an option to validate these files and if it is used in a negative way, then these signs can be faked as well. The scammers make these signs look original to the users.

What is the CurveBall bug?

If an attacker gets his hand on the correct values that were used during the creation of the certificate signs and the corresponding curve, then he may create similar keys. These keys are only checked by the vulnerable functions, and hence malicious or invalid parameters are not taken into consideration while the creation of these keys.

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This concept may be difficult for you to understand but the important thing to know is that it exploits a lately repaired vulnerability in the Microsoft Windows operating system (OS). This vulnerability is known as CurveBall and influences the parts that manage encryption and decryption.

The working mechanism of CurveBall

As we all know that there are innumerable fake websites available on the Internet which seem to look like the legitimate ones. With the exploitation of this vulnerability, CurveBall could possibly give way to the “man-in-the-middle attacks”. This means the hacker can intercept or alter the original information. This may also use the vulnerability to fake a secure web connection and file signatures as well. This ultimately means that a hacker could deploy harmful malware on your system.

What it affects?

You might be wondering what exactly is impacted by this bug and what will be the consequences of this new code. According to the latest reports by Microsoft, the bug is harmful to Windows 10, Windows Server 2019, and Windows Server 2016 OS versions and will deeply affect their users. It bypasses security features and makes it more important to undergo patching.

How to stay protected from such bugs?

McAfee is trying its best to protect its loyal users by deploying an update in its products. However, there are a few things you should do to get past the CurveBall bug before McAfee does anything to help the users. You may go through the following steps:

  1. You should update your Windows 10 OS. By doing this, you will have the latest security patches.
  2. Stay alert and practice caution while surfing an unknown website.
  3. Always use trusted sources to open files.
  4. Make sure your web browser is regularly updated with the latest version.


In this article, we have learned many things regarding “CurveBall” bug and some measures that we can take to avoid its occurrence. For further queries and to know about the latest tech scams or updates, keep visiting Our Blog Section, if you want to have Mcafee Antivirus then visit mcafee.com/activate.

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