.NET Runtime Cryptography Denial of Service Vulnerability
An early warning has been issued regarding a potential denial of service vulnerability in the .NET runtime cryptography layer when parsing X.509 certificates. Affected components include specific versions of Microsoft.NetCore.App.Runtime for Linux ARM architectures.
What happened
According to initial reports, a specially crafted X.509 certificate could allow an attacker to cause a denial of service in the.NET runtime cryptography layer. The vulnerability appears to affect versions 10.0.0 to 10.0.9 of the Microsoft.NetCore.App.Runtime for Linux ARM, ARM64, and MUSL architectures. This incident is under investigation, and further details are expected to be released in the official advisory. To assess your exposure, check if your systems are running any of the affected.NET runtime versions. It is recommended to consult the primary sources for the most accurate and up-to-date information.
How 0Day mitigates this
Microsoft.NetCore.App.Runtime.linux-arm is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.