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Home Information Security

Researchers Discover 3 Vulnerabilities in Microsoft Azure API Management Service

admin by admin
May 5, 2023
in Information Security


May 04, 2023Ravie LakshmananAPI Management / Vulnerability

Three new security flaws have been disclosed in Microsoft Azure API Management service that could be abused by malicious actors to gain access to sensitive information or backend services.

This includes two server-side request forgery (SSRF) flaws and one instance of unrestricted file upload functionality in the API Management developer portal, according to Israeli cloud security firm Ermetic.

“By abusing the SSRF vulnerabilities, attackers could send requests from the service’s CORS Proxy and the hosting proxy itself, access internal Azure assets, deny service and bypass web application firewalls,” security researcher Liv Matan said in a report shared with The Hacker News.

“With the file upload path traversal, attackers could upload malicious files to Azure’s hosted internal workload.”

Azure API Management is a multicloud management platform that allows organizations to securely expose their APIs to external and internal customers and enable a wide range of connected experiences.

Cybersecurity

Of the two SSRF flaws identified by Ermetic, one of them is a bypass for a fix put in place by Microsoft to address a similar vulnerability reported by Orca earlier this year. The other vulnerability resides in the API Management proxy function.

Exploitation of SSRF flaws can result in loss of confidentiality and integrity, permitting a threat actor to read internal Azure resources and execute unauthorized code.

Microsoft Azure API Management Service

The path traversal flaw discovered in the developer portal, on the other hand, stems from a lack of validation of the file type and path of the files uploaded.

An authenticated user can leverage this loophole to upload malicious files to the developer portal server and potentially even execute arbitrary code on the underlying system.

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Following responsible disclosure, all the three flaws have been patched by Microsoft.

The findings come weeks after researchers from Orca detailed a “by-design flaw” in Microsoft Azure could be exploited by attackers to gain access to storage accounts, move laterally in the environment, and even execute remote code.

It also follows the discovery of another Azure vulnerability dubbed EmojiDeploy that could enable an attacker to seize control of a targeted application.

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