IM
IronMonkey Threat Research

CVE-2024-26816 MEDIUM

Published: 2024-04-10 | Last Modified: 2026-05-12 | Status: Modified

Description

In the Linux kernel, the following vulnerability has been resolved: x86, relocs: Ignore relocations in .notes section When building with CONFIG_XEN_PV=y, .text symbols are emitted into the .notes section so that Xen can find the "startup_xen" entry point. This information is used prior to booting the kernel, so relocations are not useful. In fact, performing relocations against the .notes section means that the KASLR base is exposed since /sys/kernel/notes is world-readable. To avoid leaking the KASLR base without breaking unprivileged tools that are expecting to read /sys/kernel/notes, skip performing relocations in the .notes section. The values readable in .notes are then identical to those found in System.map.

Additional Descriptions (1)

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: x86, relocs: ignorar reubicaciones en la sección .notes Al compilar con CONFIG_XEN_PV=y, los símbolos .text se emiten en la sección .notes para que Xen pueda encontrar el punto de entrada "startup_xen" . Esta información se utiliza antes de iniciar el kernel, por lo que las reubicaciones no son útiles. De hecho, realizar reubicaciones en la sección .notes significa que la base KASLR está expuesta ya que /sys/kernel/notes es legible en todo el mundo. Para evitar filtrar la base de KASLR sin dañar las herramientas sin privilegios que esperan leer /sys/kernel/notes, omita realizar reubicaciones en la sección .notes. Los valores legibles en .notes son idénticos a los que se encuentran en System.map.

CVSS Metrics

Base Score: 5.5 (MEDIUM)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactNONE
Integrity ImpactNONE
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.8

Impact Score: 3.6

Weaknesses

Source Type Description
[email protected] Primary
en CWE-770

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd340a90580> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd369413ec0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd369411340> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36beb8340> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36a6e5f40> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd36a6e69c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd31b200480> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd31b202e00> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd3694111c0> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd36a6e42c0> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References