Linux Kernel ksmbd Session Setup Memory Exhaustion Denial-of-Service Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.
The specific flaw exists within the handling of SMB2_SESSION_SETUP commands. The issue results from the lack of control of resource consumption. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Additional Details
Linux has issued an update to correct this vulnerability. More details can be found at:
https://github.com/torvalds/linux/commit/ea174a91893956450510945a0c5d1a10b5323656
Disclosure Timeline
- 2023-04-27 - Vulnerability reported to vendor
- 2023-05-17 - Coordinated public release of advisory
Credit
Quentin Minster (@thalium_team)
