CVE-2017-2647

kernel: Null pointer dereference in search_keyring

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The KEYS subsystem in the Linux kernel before 3.18 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving a NULL value for a certain match field, related to the keyring_search_iterator function in keyring.c.

El subsistema KEYS en el kernel de Linux en versiones anteriores a 3.18 permite a los usuarios locales obtener privilegios o provocar una denegación de servicio (referencia a puntero NULL y bloqueo del sistema) a través de vectores que implican un valor NULL para un cierto campo de coincidencia, relacionado con la función keyring_search_iterator en keyring.c.

A flaw was found that can be triggered in keyring_search_iterator in keyring.c if type->match is NULL. A local user could use this flaw to crash the system or, potentially, escalate their privileges.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-12-01 CVE Reserved
2017-03-31 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (11)

URL	Tag	Source
http://www.securityfocus.com/bid/97258	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1428353	2020-09-24
https://github.com/torvalds/linux/commit/c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81	2023-02-12

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2017:1842	2023-02-12
https://access.redhat.com/errata/RHSA-2017:2077	2023-02-12
https://access.redhat.com/errata/RHSA-2017:2437	2023-02-12
https://access.redhat.com/errata/RHSA-2017:2444	2023-02-12
https://usn.ubuntu.com/3849-1	2023-02-12
https://usn.ubuntu.com/3849-2	2023-02-12
https://access.redhat.com/security/cve/CVE-2017-2647	2020-09-24

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"				<= 3.17.8 Search vendor "Linux" for product "Linux Kernel" and version " <= 3.17.8"		-		Affected