CVE-2023-4130 Information

Description

In the Linux kernel the following vulnerability has been resolved:

ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()

There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len not next variable. next is the start offset of current ea that got from previous ea.

Reference

https://git.kernel.org/stable/c/4bf629262f9118ee91b1c3a518ebf2b3bcb22180 https://git.kernel.org/stable/c/79ed288cef201f1f212dfb934bcaac75572fb8f6 https://git.kernel.org/stable/c/aeb974907642be095e38ecb1a400ca583958b2b0 https://git.kernel.org/stable/c/f339d76a3a972601d0738b881b099d49ebbdc3a2