January 27, 2023

Jan 17, 2023Ravie LakshmananCloud Safety / Bug Report

4 completely different Microsoft Azure companies have been discovered weak to server-side request forgery (SSRF) assaults that may very well be exploited to realize unauthorized entry to cloud assets.

The safety points, which have 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 companies, endpoints, and delicate recordsdata – offering helpful info on presumably weak servers and companies to take advantage of for preliminary entry and the situation of delicate info to focus on,” Orca researcher By Lidor Ben Shitrit said in a report shared with The Hacker Information.

Two of the vulnerabilities affecting Azure Features and Azure Digital Twins may very well be abused with out requiring any authentication, enabling a menace actor to grab management of a server with out even having an Azure account within the first place.

SSRF assaults might have serious consequences as they permit a malicious interloper to learn or replace inside assets, and worse, pivot to different components of the community, breach in any other case unreachable programs to extract helpful information.

Three of the issues are rated Necessary in severity, whereas the SSRF flaw impacting Azure Machine Studying is rated Low in severity. All of the weaknesses may be leveraged to control a server to mount additional assaults towards a inclined goal.

A quick abstract of the 4 vulnerabilities is as observe –

  • Unauthenticated SSRF on Azure Digital Twins Explorer by way of a flaw within the /proxy/blob endpoint that may very well be exploited to get a response from any service that is suffixed with “blob.core.home windows[.]internet”
  • Unauthenticated SSRF on Azure Features that may very well be exploited to enumerate native ports and entry inside endpoints
  • Authenticated SSRF on Azure API Administration service that may very well be exploited to listing inside ports, together with one related to a supply code administration service that might then be used to entry delicate recordsdata
  • Authenticated SSRF on Azure Machine Studying service by way of the /datacall/streamcontent endpoint that may very well be exploited to fetch content material from arbitrary endpoints

To mitigate such threats, organizations are really helpful to validate all enter, be sure that servers are configured to solely permit needed inbound and outbound visitors, keep away from misconfigurations, and cling to the precept of least privilege (PoLP).

“Probably the most notable side of those discoveries is arguably the variety of SSRF vulnerabilities we have been capable of finding with solely minimal effort, indicating simply how prevalent they are and the chance they pose in cloud environments,” Ben Shitrit stated.

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