SMB: Linux Kernel ksmbd Compounded Request Handling NULL Pointer Dereference
This signature detects attempts to exploit a known vulnerability against Linux Kernel. A successful attack can result in a denial-of-service condition.
Extended Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate session id and tree id in compound request `smb2_get_msg()` in smb2_get_ksmbd_tcon() and smb2_check_user_session() will always return the first request smb2 header in a compound request. if `SMB2_TREE_CONNECT_HE` is the first command in compound request, will return 0, i.e. The tree id check is skipped. This patch use ksmbd_req_buf_next() to get current command in compound.
Affected Products
Linux linux_kernel
Short Name
SMB:LNX-KSMBD-CMPD-RQT-HNDLG
Severity
Major
Recommended
False
Recommended Action
Drop
Category
SMB
Keywords
CVE-2023-3866 CVE-2023-52442 Compounded Dereference Handling Kernel Linux NULL Pointer Request ksmbd
Release Date
09/29/2023
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3765
False Positive
Unknown
Vendors
Linux