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MSRC

Month Archives: April 2022

Azure Database for PostgreSQL Flexible Server Privilege Escalation and Remote Code Execution

Thursday, April 28, 2022

MSRC was informed by Wiz, a cloud security vendor, under Coordinated Vulnerability Disclosure (CVD) of an issue with the Azure Database for PostgreSQL Flexible Server that could result in unauthorized cross-account database access in a region. By exploiting an elevated permissions bug in the Flexible Server authentication process for a replication user, a malicious user could leverage an improperly anchored regular expression to bypass authentication to gain access to other customers’ databases.

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Congratulations and New Swag Awards for the Top MSRC 2022 Q1 Security Researchers!

Thursday, April 21, 2022

Today, we are excited to recognize this quarter’s Microsoft Researcher Recognition Program leaderboard and share new swag awards and improvements to the leaderboard. Congratulations and thank you to everyone for your hard work and continued partnership to secure customers. The top three researchers of the 2022 Q1 Security Researcher Leaderboard are: Yuki Chen, William Söderberg, and Terry Zhang @pnig0s!

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Expanding High Impact Scenario Awards for Microsoft Bug Bounty Programs

Thursday, April 14, 2022

We are excited to announce the addition of scenario-based bounty awards to the Dynamics 365 and Power Platform Bounty Program and M365 Bounty Program. Through these new scenario-based bounty awards, we encourage researchers to focus their research on vulnerabilities that have the highest potential impact on customer privacy and security. Awards increase by up to 30% ($26,000 USD total) for eligible scenario submissions.

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Microsoft’s Response to CVE-2022-22965 Spring Framework

Tuesday, April 05, 2022

Summary Microsoft used the Spring Framework RCE, Early Announcement to inform analysis of the remote code execution vulnerability, CVE-2022-22965, disclosed on 31 Mar 2022. We have not to date noted any impact to the security of our enterprise services and have not experienced any degraded service availability due to this vulnerability.

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On-Premises Servers Products are Here! Introducing the Applications and On-Premises Servers Bug Bounty Program

Tuesday, April 05, 2022

Microsoft is excited to announce the addition of Exchange on-premises, SharePoint on-premises, and Skype for Business on-premises to the Applications and On-Premises Servers Bounty Program. Through this expanded program, we encourage researchers to discover and report high-impact security vulnerabilities to help protect customers. We offer awards up to $26,000 USD for eligible submissions.

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Randomizing the KUSER_SHARED_DATA Structure on Windows

Tuesday, April 05, 2022

Windows 10 made a lot of improvements in Kernel Address Space Layout Randomization (KASLR) that increases the cost of exploitation, particularly for remote code execution exploits. Many kernel virtual address space (VAS) locations including kernel stacks, pools, system PTEs etc. are randomized. A well-known exception to this is the KUSER_SHARED_DATA structure which is a page of memory that has always been traditionally mapped at a fixed virtual address in the kernel.

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