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zdi8437438cb38d8565e9a990474a7b8d2b3e3770a521eb159325e93c6189f526d1ZDI-23-980
HistoryJul 28, 2023 - 12:00 a.m.

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

2023-07-2800:00:00
8437438cb38d8565e9a990474a7b8d2b3e3770a521eb159325e93c6189f526d1
www.zerodayinitiative.com
16
linux kernel
ksmbd
out-of-bounds read
information disclosure
vulnerability
remote attackers
authentication
sensitive information
smb2_hdr
buffer overflow
arbitrary code

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication may or may not be required to exploit this vulnerability, depending upon configuration. Furthermore, only systems with ksmbd enabled are vulnerable. The specific flaw exists within the parsing of smb2_hdr structure. 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.