The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added the recently disclosed remote code execution (RCE) vulnerability affecting the Spring Framework, to its Known Exploited Vulnerabilities Catalog based on “evidence of active exploitation.”
The critical severity flaw, assigned the identifier CVE-2022-22965 (CVSS score: 9.8) and dubbed “Spring4Shell”, impacts Spring model–view–controller (MVC) and Spring WebFlux applications running on Java Development Kit 9 and later.
“Exploitation requires an endpoint with DataBinder enabled (e.g., a POST request that decodes data from the request body automatically) and depends heavily on the servlet container for the application,” Praetorian researchers Anthony Weems and Dallas Kaman noted last week.
Although exact details of in-the-wild abuse remain unclear, information security company SecurityScorecard said “active scanning for this vulnerability has been observed coming from the usual suspects like Russian and Chinese IP space.”
Similar scanning activities have been spotted by Akamai and Palo Alto Networks’ Unit42, with the attempts leading to the deployment of a web shell for backdoor access and to execute arbitrary commands on the server with the goal of delivering other malware or spreading within the target network.
images from Hacker News