A newly disclosed security vulnerability, CVE-2025-24043, affecting Microsoft’s WinDbg debugger, poses a severe remote code execution (RCE) threat due to improper cryptographic signature verification in the SOS debugging extension. With a CVSS score of 7.5, this flaw allows an authorized attacker to execute malicious code over a network, potentially compromising affected systems.
WinDbg is a powerful debugging tool used for diagnosing user-mode applications, device drivers, and Windows kernel-level issues. Given its widespread usage among developers and security professionals, any vulnerability in this tool could have far-reaching consequences.
The CVE-2025-24043 vulnerability stems from a flaw in how the SOS debugging extension within WinDbg verifies cryptographic signatures. Attackers with network access can bypass authentication mechanisms, leading to unauthorized remote code execution on affected systems. Notably, Microsoft has not identified any mitigating factors, further increasing the risk posed by this exploit.
The vulnerability affects any Microsoft .NET Core project that references the following affected WinDbg package versions:
| Package name | Affected version | Patched version |
|---|---|---|
| dotnet-sos | < 9.0.607501 | 9.0.607501 |
| dotnet-dump | < 9.0.557512 | 9.0.607501 |
| dotnet-debugger-extensions | 9.0.557512 | 9.0.607601 |
To mitigate this risk, Microsoft recommends installing the latest version of WinDbg and updating any application references to the patched package versions. Users and organizations must act swiftly to prevent potential exploits in production environments.
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