Microsoft removes all downloads signed with SHA-1

Microsoft removes all downloads of from the Microsoft Download Center signed using SHA-1 certificates on August 3, 2020.

Ο SHA-1 was commonly used to code sign executable files, and TLS and SSL certificates are used on websites to authenticate an issuer.

In 2015, security researchers published a report which describes in detail how SHA-1 is vulnerable to attacks that could allow intruders to forge digital certificates to impersonate a company or other site.

These forgeries could then be used in phishing attacks, corporate forgeries or man-in-the-middle attacks.

Due to problems with certificates SHA-1, Microsoft and other developers are starting to use them and demand its use SHA-2 to install Windows updates.

In a new newsletter published yesterday, Microsoft says it is pulling all Secure Hash 1 (SHA-1) signed Windows content from the Microsoft Download Center for more .

“SHA-1 is one cryptographic hash that many in the security community believe is no longer secure. Using the SHA-1 algorithm in digital certificates could allow an attacker to spoof content, perform phishing or man-in-the-middle attacks.”

Note that although Microsoft only supports signed content with SHA-2 in official content, Windows executables signed with SHA-1 will still be able to run on the operating system.

So if you have previously signed with SHA-1 and you still use them, you should download them before the Microsoft on August 3.

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Written by giorgos

George still wonders what he's doing here ...

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