Experts Uncover How Cybercriminals Could Exploit Microsoft Entra ID for Elevated Privilege

Cybersecurity scientists have found out a scenario of privilege escalation related with a Microsoft Entra ID (formerly Azure Active Listing) software by using edge of an deserted reply URL.

“An attacker could leverage this abandoned URL to redirect authorization codes to by themselves, exchanging the ill-gotten authorization codes for accessibility tokens,” Secureworks Counter Threat Device (CTU) said in a technological report printed final week.

“The menace actor could then call Electrical power Platform API by using a center-tier services and obtain elevated privileges.”

Subsequent dependable disclosure on April 5, 2023, the issue was tackled by Microsoft by means of an update produced a working day afterwards. Secureworks has also built obtainable an open up-supply device that other organizations can use to scan for deserted reply URLs.

Reply URL, also termed redirect URI, refers to the locale exactly where the authorization server sends the person once the app has been properly licensed and granted an authorization code or access token.

“The authorization server sends the code or token to the redirect URI, so it can be significant you sign up the suitable location as component of the application registration process,” Microsoft notes in its documentation.

Secureworks CTU claimed it recognized an abandoned Dynamics Data Integration application reply URL linked with the Azure Targeted visitors Manager profile that manufactured it doable to invoke the Electrical power Platform API through a center-tier service and tamper with the natural environment configurations.

In a hypothetical attack situation, this could have been used to acquire the system administrator function for an present provider principal and mail requests to delete an ecosystem, as properly as abuse the Azure Advertisement Graph API to gather info about the concentrate on in purchase to stage observe-on activities.

This, even so, banking companies on the chance that a victim clicks on a destructive url, as a end result of which the authorization code issued by Microsoft Entra ID on logging is delivered to a redirect URL hijacked by the danger actor.

The disclosure comes as Kroll discovered an uptick in DocuSign-themed phishing strategies utilizing open up redirects, enabling adversaries to propagate specifically crafted URLs that, when clicked, redirect opportunity victims to a malicious web page.

“By crafting a deceptive URL that leverages a reliable web site, malicious actors can a lot more easily manipulate end users into clicking the url, as well as deceiving/bypassing network technology that scans links for malicious information,” Kroll’s George Glass mentioned.

“This benefits in a victim currently being redirected to a destructive website made to steal delicate data, such as login qualifications, credit history card information or private data.”

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Some parts of this article are sourced from:
thehackernews.com