Advisory Details

January 23rd, 2023

Linux Kernel ksmbd Out-Of-Bounds Read Information Disclosure Vulnerability

CVE ID	CVE-2022-47943
CVSS SCORE	9.6, AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
AFFECTED VENDORS	Linux
AFFECTED PRODUCTS	Kernel
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of SMB2_WRITE commands. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ac60778b87e45576d7bfdbd6f53df902654e6f09
DISCLOSURE TIMELINE	2022-07-26 - Vulnerability reported to vendor 2023-01-23 - Coordinated public release of advisory 2023-03-21 - Advisory Updated
CREDIT	Arnaud Gatignol, Quentin Minster, Florent Saudel, Guillaume Teissier (@thalium_team)

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