// For flags

CVE-2022-47942

Linux Kernel ksmbd Heap-based Buffer Overflow Remote Code Execution Vulnerability

Severity Score

8.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An issue was discovered in ksmbd in the Linux kernel 5.15 through 5.19 before 5.19.2. There is a heap-based buffer overflow in set_ntacl_dacl, related to use of SMB2_QUERY_INFO_HE after a malformed SMB2_SET_INFO_HE command.

Se descubrió un problema en ksmbd en el kernel de Linux 5.15 a 5.19 anterior a 5.19.2. Hay un desbordamiento de búfer en la región Heap de la memoria en set_ntacl_dacl, relacionado con el uso de SMB2_QUERY_INFO_HE después de un comando SMB2_SET_INFO_HE con formato incorrecto.

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Linux Kernel. Authentication is required to exploit this vulnerability.
The specific flaw exists within the handling of file attributes. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the kernel.

*Credits: Arnaud Gatignol, Quentin Minster, Florent Saudel, Guillaume Teissier (@thalium_team)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2022-12-22 CVE Published
  • 2022-12-23 CVE Reserved
  • 2024-08-03 CVE Updated
  • 2024-08-13 EPSS 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 < 5.15.62
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15 < 5.15.62"
-
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.16 < 5.18.18
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 5.18.18"
-
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.19 < 5.19.2
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.19 < 5.19.2"
-
Affected