Advisory Details

   March 1st, 2024

Linux Kernel ksmbd Chained Request Improper Input Validation Information Disclosure Vulnerability

  ZDI-24-227
  ZDI-CAN-21506

   CVE ID                CVE-2023-52442
   CVSS SCORE            9.3, AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L
   AFFECTED VENDORS      Linux
   AFFECTED PRODUCTS     Kernel
                         This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.
   VULNERABILITY DETAILS
                         The specific flaw exists within the handling of chained requests. The issue results from the lack of proper validation of user-supplied requests prior to processing them. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of
                         the kernel.
   ADDITIONAL DETAILS    Linux has issued an update to correct this vulnerability. More details can be found at:
                         https://github.com/torvalds/linux/commit/3df0411e132ee74a87aa13142dfd2b190275332e
   DISCLOSURE TIMELINE     • 2023-07-18 - Vulnerability reported to vendor
                           • 2024-03-01 - Coordinated public release of advisory
   CREDIT                HexRabbit (@h3xr4bb1t)