CVE-2023-52442: linux kernel — Fix

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.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.15 — 5.15.145
linux	linux_kernel	5.16 — 6.1.53
linux	linux_kernel	6.2 — 6.4.16
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f https://git.kernel.org/stable/c/017d85c94f02090a87f4a473dbe0d6ee0da72693 https://git.kernel.org/stable/c/3df0411e132ee74a87aa13142dfd2b190275332e https://git.kernel.org/stable/c/4c2b350b2e269e3fd17bbfa42de1b42775b777ac https://git.kernel.org/stable/c/becb5191d1d5fdfca0198a2e37457bbbf4fe266f

Frequently Asked Questions

What is CVE-2023-52442? +

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. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52442? +

CVE-2023-52442 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-52442? +

CVE-2023-52442 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52442? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-52442