Overview
The vulnerability identified as CVE-2025-47158 is a significant security concern that primarily affects users and organizations utilizing Azure DevOps. This flaw, which allows an unauthorized attacker to bypass authentication procedures via assumed-immutable data, has serious implications. It could lead to an elevation of privileges over a network, thereby granting an attacker unwarranted access to potentially sensitive data and system resources. Given the widespread use of Azure DevOps in various sectors, understanding and mitigating this vulnerability is of paramount importance.
Vulnerability Summary
CVE ID: CVE-2025-47158
Severity: Critical (9.0)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Azure DevOps Server | All versions prior to the patched update
How the Exploit Works
This exploit works by taking advantage of a flaw in the Azure DevOps system, where certain data is assumed to be unchangeable. An attacker can manipulate this assumed-immutable data to bypass the authentication procedure. This circumvention of the authentication process allows the attacker to potentially gain unauthorized access to elevated privileges over the network. As a result, the attacker could potentially compromise the system or cause data leakage.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This is a hypothetical HTTP request that manipulates the assumed-immutable data:
POST /azure-devops/authenticate HTTP/1.1
Host: target.azuredevops.com
Content-Type: application/json
{
"username": "legitimate_user",
"password": "legitimate_password",
"immutable_data": "manipulated_data"
}In this conceptual example, the attacker is sending a POST request to the Azure DevOps authentication endpoint. By manipulating the ‘immutable_data’ field in the request, the attacker can bypass the authentication process and elevate their privileges.
Mitigation
The best way to mitigate this vulnerability is by applying the vendor patch as soon as it becomes available. This patch will rectify the flaw in the Azure DevOps system that allows the assumed-immutable data to be manipulated. In the interim period before the patch is applied, it is recommended to use Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) as temporary mitigation measures. The use of these systems can help detect and prevent any unauthorized access attempts that may be trying to exploit this vulnerability.