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January 17, 2023ravie lakshmananBug reporting/cloud safety

Microsoft Azure Services

4 completely different Microsoft Azure providers have been discovered to be susceptible to Server Facet Request Forgery (SSRF) assaults that could possibly be exploited to realize unauthorized entry to cloud sources.

The safety points, which had been found by Orca between October 8, 2022 and December 2, 2022 in Azure API Administration, Azure Features, Azure Machine Studying, and Azure Digital Twins, have since been addressed by Microsoft.

“The found Azure SSRF vulnerabilities allowed an attacker to scan native ports, discover new providers, endpoints, and delicate information, which supplied useful details about doubtlessly susceptible servers and providers to use for preliminary entry and site of delicate info.” stated the Orca researcher. By Lidor Ben Shitrit stated in a report shared with The Hacker Information.

Two of the vulnerabilities affecting Azure Features and Azure Digital Twins could possibly be abused with out requiring any authentication, permitting a risk actor to take management of a server with out even having an Azure account within the first place.

SSRF assaults might have critical penalties, permitting a malicious intruder to learn or replace inner sources and, worse, to maneuver to different components of the community, breaching in any other case unreachable techniques to extract useful information.

Three of the failings are of excessive severity, whereas the SSRF flaw that impacts Azure Machine Studying is of low severity. All weaknesses could be exploited to control a server to mount extra assaults in opposition to a prone goal.

A quick abstract of the 4 vulnerabilities is as follows:

  • Unauthenticated SSRF in Azure Digital Twins Explorer through a flaw within the /proxy/blob endpoint that could possibly be exploited to get a response from any service with the suffix “blob.core.home windows[.]web”
  • Unauthenticated SSRF in Azure Features that could possibly be exploited to enumerate native ports and entry inner endpoints
  • Authenticated SSRF in opposition to the Azure API Administration service that could possibly be exploited to enumerate inner ports, together with one related to a supply code administration service that would then be used to entry delicate information
  • SSRF authenticated to the Azure Machine Studying service through the /datacall/streamcontent endpoint which could possibly be exploited to acquire content material from arbitrary endpoints

To mitigate such threats, organizations are inspired to validate all enter, guarantee servers are configured to permit solely mandatory inbound and outbound visitors, keep away from misconfigurations, and cling to the precept of least privilege (PoLP).

“Essentially the most notable facet of those discoveries is presumably the variety of SSRF vulnerabilities we had been capable of finding with solely minimal effort, indicating how prevalent they’re and the way dangerous they’re in cloud environments,” stated Ben Shitrit.

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Microsoft Azure Services Flaws Could’ve Exposed Cloud Resources to Unauthorized Access

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