// For flags

CVE-2023-52442

ksmbd: validate session id and tree id in compound request

Severity Score

9.3
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ksmbd: validar la identificación de la sesión y la identificación del árbol en la solicitud compuesta `smb2_get_msg()` en smb2_get_ksmbd_tcon() y smb2_check_user_session() siempre devolverá el encabezado smb2 de la primera solicitud en una solicitud compuesta. si `SMB2_TREE_CONNECT_HE` es el primer comando en la solicitud compuesta, devolverá 0, es decir, se omite la verificación de identificación del árbol. Este parche usa ksmbd_req_buf_next() para obtener el comando actual en compuesto.

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Linux Kernel. Authentication is not required to exploit this vulnerability, but only systems with ksmbd enabled are vulnerable.
The specific flaw exists within the handling of chained requests. The issue results from the lack of proper validation of user-supplied requests prior to processing them. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.

*Credits: HexRabbit (@h3xr4bb1t)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-20 CVE Reserved
  • 2024-02-21 CVE Published
  • 2024-12-17 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.15 < 5.15.145
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 5.15.145"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.15 < 6.1.53
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.1.53"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.15 < 6.4.16
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.4.16"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.15 < 6.5
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 6.5"
en
Affected