Security News
The Microsoft AI research division accidentally leaked dozens of terabytes of sensitive data while contributing open-source AI learning models to a public GitHub repository. Microsoft linked the data exposure to using an excessively permissive Shared Access Signature token.
The BlackCat ransomware gang now uses stolen Microsoft accounts and the recently spotted Sphynx encryptor to encrypt targets' Azure cloud storage. In total, the ransomware operators could encrypt 39 Azure Storage accounts successfully.
More details have emerged about a set of now-patched cross-site scripting flaws in the Microsoft Azure HDInsight open-source analytics service that could be weaponized by a threat actor to carry out malicious activities. "The identified vulnerabilities consisted of six stored XSS and two reflected XSS vulnerabilities, each of which could be exploited to perform unauthorized actions, varying from data access to session hijacking and delivering malicious payloads," Orca security researcher Lidor Ben Shitrit said in a report shared with The Hacker News.
Cisco-owned multi-factor authentication provider Duo Security is investigating an ongoing outage that has been causing authentication failures and errors starting three hours ago. The outage also led to Core Authentication Service issues across multiple Duo servers, triggering Azure Auth authentication errors for Azure Conditional Access integrations in a systemwide outage.
Microsoft is working on creating guidelines for red teams making sure generative AI is secure and responsible.
Microsoft's new Azure Active Directory Cross-Tenant Synchronization feature, introduced in June 2023, has created a new potential attack surface that might allow threat actors to more easily spread laterally to other Azure tenants. Microsoft tenants are client organizations or sub-organizations in Azure Active Directory that are configured with their own policies, users, and settings.
The Microsoft private encryption key stolen by Storm-0558 Chinese hackers provided them with access far beyond the Exchange Online and Outlook.com accounts that Redmond said were compromised, according to Wiz security researchers. While Microsoft said that only Exchange Online and Outlook were impacted, Wiz says the threat actors could use the compromised Azure AD private key to impersonate any account within any impacted customer or cloud-based Microsoft application.
According to cloud security company Wiz, the inactive Microsoft account consumer signing key used to forge Azure Active Directory tokens to gain illicit access to Outlook Web Access and Outlook.com could also have allowed the adversary to forge access tokens for various types of Azure AD applications. Wiz's analysis fills in some of the blanks, with the company discovering that "All Azure personal account v2.0 applications depend on a list of 8 public keys, and all Azure multi-tenant v2.0 applications with Microsoft account enabled depend on a list of 7 public keys."
A criminal crew with a history of deploying malware to harvest credentials from Amazon Web Services accounts may expand its attention to organizations using Microsoft Azure and Google Cloud Platform. The crooks used to target primarily AWS users, and now seem to be looking for ways into Azure and Google Cloud accounts.
Microsoft on Friday said a validation error in its source code allowed for Azure Active Directory tokens to be forged by a malicious actor known as Storm-0558 using a Microsoft account consumer signing key to breach two dozen organizations. "Storm-0558 acquired an inactive MSA consumer signing key and used it to forge authentication tokens for Azure AD enterprise and MSA consumer to access OWA and Outlook.com," the tech giant said in a deeper analysis of the campaign.