// For flags

CVE-2023-52755

ksmbd: fix slab out of bounds write in smb_inherit_dacl()

Severity Score

8.4
*CVSS v3.1

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: fix slab out of bounds write in smb_inherit_dacl()

slab out-of-bounds write is caused by that offsets is bigger than pntsd
allocation size. This patch add the check to validate 3 offsets using
allocation size.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: ksmbd: corrige la escritura fuera de los límites de slab en smb_inherit_dacl(). La escritura fuera de los límites de slab se debe a que las compensaciones son mayores que el tamaño de asignación de pntsd. Este parche agrega la verificación para validar 3 compensaciones usando el tamaño de asignación.

This vulnerability allows remote attackers to execute arbitrary code 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 processing of ACL attributes. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the kernel.

*Credits: HexRabbit (@h3xr4bb1t)
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2024-05-21 CVE Reserved
  • 2024-05-21 CVE Published
  • 2024-05-22 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-787: Out-of-bounds Write
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"
 < 5.15.140
Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.140"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.1.64
Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.64"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.5.13
Search vendor "Linux" for product "Linux Kernel" and version " < 6.5.13"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.6.3
Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.3"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 < 6.7
Search vendor "Linux" for product "Linux Kernel" and version " < 6.7"
en
Affected