Security News > 2024 > January > CISA: Critical Microsoft SharePoint bug now actively exploited

CISA warns that attackers are now exploiting a critical Microsoft SharePoint privilege escalation vulnerability that can be chained with another critical bug for remote code execution.

This Microsoft SharePoint Server exploit chain was successfully demoed by STAR Labs researcher Jang during last year's March 2023 Pwn2Own contest in Vancouver, earning a $100,000 reward.

Even though the exploit does not grant remote code execution on targeted systems, since it's not a complete exploit for the chain demoed at Pwn2Own, its author said attackers could chain it with the CVE-2023-24955 bug themselves for RCE. "The script outputs details of admin users with elevated privileges and can operate in both single and mass exploit modes," the PoC exploit's developer says.

While it has yet to provide additional details on CVE-2023-29357 active exploitation, CISA added the vulnerability to its Known Exploited Vulnerabilities Catalog and now requires U.S. federal agencies to patch it by the end of the month, on January 31.

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News URL

https://www.bleepingcomputer.com/news/security/cisa-critical-microsoft-sharepoint-bug-now-actively-exploited/