Microsoft Sounds the Alarm: Public ASP.NET Keys Could Open the Gates for Hacker Havoc
Microsoft warns developers against using publicly disclosed ASP.NET machine keys, as this insecure practice allows attackers to exploit ViewState code injection vulnerabilities. With over 3,000 keys identified, this poses a significant risk. To mitigate threats, avoid using public keys and rotate them regularly.

Hot Take:
It seems like Microsoft has discovered a new contender for the “Worst Place to Hide Your Keys” award! Apparently, some developers are treating ASP.NET machine keys like they’re house keys under a doormat. Spoiler alert: cyber criminals aren’t as courteous as your neighbor when it comes to not taking advantage of such opportunities. Let’s just say these developers are not exactly winning any security Oscars this year.
Key Points:
- Microsoft warns against the use of publicly disclosed ASP.NET machine keys.
- Over 3,000 keys identified that could lead to ViewState code injection attacks.
- These keys are often found in public code repositories, increasing risk.
- ViewState helps maintain page data but can be exploited if keys are exposed.
- Microsoft advises against using public keys and emphasizes regular key rotation.
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