CVE-2024-26816

x86, relocs: Ignore relocations in .notes section

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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.

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.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-04-10 CVE Published
2024-04-11 EPSS Updated
2024-11-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (12)

URL	Tag	Source
https://git.kernel.org/stable/c/5ead97c84fa7d63a6a7a2f4e9f18f452bd109045	Vuln. Introduced
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/13edb509abc91c72152a11baaf0e7c060a312e03	2024-03-26
https://git.kernel.org/stable/c/52018aa146e3cf76569a9b1e6e49a2b7c8d4a088	2024-03-26
https://git.kernel.org/stable/c/a4e7ff1a74274e59a2de9bb57236542aa990d20a	2024-03-26
https://git.kernel.org/stable/c/c7cff9780297d55d97ad068b68b703cfe53ef9af	2024-03-26
https://git.kernel.org/stable/c/47635b112a64b7b208224962471e7e42f110e723	2024-03-26
https://git.kernel.org/stable/c/af2a9f98d884205145fd155304a6955822ccca1c	2024-03-26
https://git.kernel.org/stable/c/ae7079238f6faf1b94accfccf334e98b46a0c0aa	2024-03-26
https://git.kernel.org/stable/c/5cb59db49c9c0fccfd33b2209af4f7ae3c6ddf40	2024-03-26
https://git.kernel.org/stable/c/aaa8736370db1a78f0e8434344a484f9fd20be3b	2024-03-01

URL	Date	SRC

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"				>= 2.6.23 < 4.19.311 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 4.19.311"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 5.4.273 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 5.4.273"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 5.10.214 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 5.10.214"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 5.15.153 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 5.15.153"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 6.1.83 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 6.1.83"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 6.6.23 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 6.6.23"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 6.7.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 6.7.11"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 6.8.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 6.8.2"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 2.6.23 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.23 < 6.9"		en		Affected