CVE-2022-48987

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-48987
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-dv-timings.c: fix too strict blanking sanity checks Sanity checks were added to verify the v4l2_bt_timings blanking fields in order to avoid integer overflows when userspace passes weird values. But that assumed that userspace would correctly fill in the front porch, backporch and sync values, but sometimes all you know is the total blanking, which is then assigned to just one of these fields. And that can fail with these checks. So instead set a maximum for the total horizontal and vertical blanking and check that each field remains below that. That is still sufficient to avoid integer overflows, but it also allows for more flexibility in how userspace fills in these fields.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971 Patch
https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89 Patch
https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2 Patch
https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c Patch
https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee Patch
https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608 Patch
https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e Patch
https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3 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

01 Nov 2024, 15:27

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
CWE CWE-190
References () https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971 - () https://git.kernel.org/stable/c/0d73b49c4037199472b29574ae21c21aef493971 - Patch
References () https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89 - () https://git.kernel.org/stable/c/2572ab14b73aa45b6ae7e4c089ccf119fed5cf89 - Patch
References () https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2 - () https://git.kernel.org/stable/c/32f01f0306a98629508f84d7ef0d1d037bc274a2 - Patch
References () https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c - () https://git.kernel.org/stable/c/4afc77068e36cee45b39d4fdc7513de26980f72c - Patch
References () https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee - () https://git.kernel.org/stable/c/5eef2141776da02772c44ec406d6871a790761ee - Patch
References () https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608 - () https://git.kernel.org/stable/c/6fb8bc29bfa80707994a63cc97e2f9920e0b0608 - Patch
References () https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e - () https://git.kernel.org/stable/c/a2b56627c0d13009e02f6f2c0206c0451ed19a0e - Patch
References () https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3 - () https://git.kernel.org/stable/c/d3d14cdf1c7ae2caa3e999bae95ba99e955fb7c3 - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

23 Oct 2024, 15:13

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: media: v4l2-dv-timings.c: se corrigen comprobaciones de cordura de borrado demasiado estrictas Se añadieron comprobaciones de cordura para verificar los campos de borrado de v4l2_bt_timings para evitar desbordamientos de enteros cuando el espacio de usuario pasa valores extraños. Pero eso suponía que el espacio de usuario rellenaría correctamente los valores de front porch, back porch y sync, pero a veces todo lo que sabes es el borrado total, que luego se asigna a solo uno de estos campos. Y eso puede fallar con estas comprobaciones. Así que, en su lugar, establece un máximo para el borrado horizontal y vertical total y comprueba que cada campo permanezca por debajo de eso. Eso sigue siendo suficiente para evitar desbordamientos de enteros, pero también permite más flexibilidad en cómo el espacio de usuario rellena estos campos.

21 Oct 2024, 20:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-10-21 20:15

Updated : 2024-11-01 15:27

NVD link : CVE-2022-48987

Mitre link : CVE-2022-48987

CVE.ORG link : CVE-2022-48987

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-190

Integer Overflow or Wraparound