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critical advisory

Microsoft Power Pages Vulnerability Enables Remote Code Execution

A remote, anonymous attacker can exploit a vulnerability in Microsoft Power Pages to execute arbitrary program code.

A vulnerability exists within Microsoft Power Pages that allows for remote code execution. The vulnerability can be exploited by an unauthenticated, remote attacker. This allows the attacker to execute arbitrary code within the context of the Power Pages application. Successful exploitation of this vulnerability could lead to a complete compromise of the application, including data theft, modification, or denial of service. The specific details of the vulnerability are not described in the source document, but defenders should be aware of potential risks associated with unpatched Power Pages instances.

Attack Chain

  1. An unauthenticated, remote attacker identifies a vulnerable Microsoft Power Pages instance.
  2. The attacker crafts a malicious request targeting the specific vulnerability in Power Pages.
  3. The request is sent to the Power Pages application.
  4. The vulnerable Power Pages instance processes the malicious request without proper validation.
  5. The attacker’s code is injected into the Power Pages application.
  6. The injected code executes within the context of the Power Pages application.
  7. The attacker gains control of the Power Pages application.
  8. The attacker performs malicious activities, such as data theft, modification, or denial of service.

Impact

Successful exploitation of this vulnerability allows a remote attacker to execute arbitrary code on the Microsoft Power Pages platform. This can lead to a complete compromise of the affected application, potentially impacting sensitive data, business operations, and overall system security. The lack of specific details makes it difficult to quantify the potential damage, but the risk is significant due to the critical nature of code execution vulnerabilities.

Recommendation

  • Monitor web server logs for suspicious requests targeting Microsoft Power Pages, looking for unusual patterns or attempts to inject code (see Sigma rule “Detect Suspicious Power Pages Requests”).
  • Apply the latest security patches and updates provided by Microsoft for Power Pages to remediate the vulnerability.
  • Implement web application firewall (WAF) rules to filter out malicious requests targeting the Power Pages application.

Detection coverage 2

Detect Suspicious Power Pages Requests

high

Detects suspicious HTTP requests to Microsoft Power Pages that may indicate exploitation attempts.

sigma tactics: execution, initial_access techniques: T1059, T1566 sources: webserver

Detect Power Pages Request with Base64 Encoded Data

medium

Detects requests to Microsoft Power Pages with base64 encoded data in the query string, which might be used to obfuscate malicious commands.

sigma tactics: defense_evasion techniques: T1027 sources: webserver

Detection queries are available on the platform. Get full rules →