CVE-2024-39480

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-39480
In the Linux kernel, the following vulnerability has been resolved: kdb: Fix buffer overflow during tab-complete Currently, when the user attempts symbol completion with the Tab key, kdb will use strncpy() to insert the completed symbol into the command buffer. Unfortunately it passes the size of the source buffer rather than the destination to strncpy() with predictably horrible results. Most obviously if the command buffer is already full but cp, the cursor position, is in the middle of the buffer, then we will write past the end of the supplied buffer. Fix this by replacing the dubious strncpy() calls with memmove()/memcpy() calls plus explicit boundary checks to make sure we have enough space before we start moving characters around.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5 Mailing List Patch
https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7 Mailing List Patch
https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96 Mailing List Patch
https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8a Mailing List Patch
https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454 Mailing List Patch
https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33 Mailing List Patch
https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7 Mailing List Patch
https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992 Mailing List Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

21 Aug 2024, 08:35

Type Values Removed Values Added
CWE CWE-121

08 Jul 2024, 18:01

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.8
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References () https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5 - () https://git.kernel.org/stable/c/107e825cc448b7834b31e8b1b3cf0f57426d46d5 - Mailing List, Patch
References () https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7 - () https://git.kernel.org/stable/c/33d9c814652b971461d1e30bead6792851c209e7 - Mailing List, Patch
References () https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96 - () https://git.kernel.org/stable/c/cfdc2fa4db57503bc6d3817240547c8ddc55fa96 - Mailing List, Patch
References () https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8a - () https://git.kernel.org/stable/c/ddd2972d8e2dee3b33e8121669d55def59f0be8a - Mailing List, Patch
References () https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454 - () https://git.kernel.org/stable/c/e9730744bf3af04cda23799029342aa3cddbc454 - Mailing List, Patch
References () https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33 - () https://git.kernel.org/stable/c/f636a40834d22e5e3fc748f060211879c056cd33 - Mailing List, Patch
References () https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7 - () https://git.kernel.org/stable/c/f694da720dcf795dc3eb97bf76d220213f76aaa7 - Mailing List, Patch
References () https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992 - () https://git.kernel.org/stable/c/fb824a99e148ff272a53d71d84122728b5f00992 - Mailing List, Patch
CWE CWE-120
First Time Linux
Linux linux Kernel

05 Jul 2024, 12:55

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: kdb: corrige el desbordamiento del búfer durante la finalización de tabulación Actualmente, cuando el usuario intenta completar el símbolo con la tecla Tab, kdb usará strncpy() para insertar el símbolo completado en el búfer de comando. Desafortunadamente, pasa el tamaño del búfer de origen en lugar del destino a strncpy() con resultados predeciblemente horribles. Lo más obvio es que si el búfer de comando ya está lleno pero cp, la posición del cursor, está en el medio del búfer, entonces escribiremos más allá del final del búfer proporcionado. Solucione este problema reemplazando las dudosas llamadas strncpy() con llamadas memmove()/memcpy() más comprobaciones explícitas de los límites para asegurarnos de que tenemos suficiente espacio antes de comenzar a mover los personajes.

05 Jul 2024, 07:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-07-05 07:15

Updated : 2024-08-21 08:35

NVD link : CVE-2024-39480

Mitre link : CVE-2024-39480

CVE.ORG link : CVE-2024-39480

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CWE-121

Stack-based Buffer Overflow