CVE-2018-7191

kernel: denial of service via ioctl call in network tun handling

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the tun subsystem in the Linux kernel before 4.13.14, dev_get_valid_name is not called before register_netdevice. This allows local users to cause a denial of service (NULL pointer dereference and panic) via an ioctl(TUNSETIFF) call with a dev name containing a / character. This is similar to CVE-2013-4343.

En el subsistema tun en el kernel de Linux anterior a 4.13.14, dev_get_valid_name no es llamada antes de register_netdevice. Esto permite que los usuarios locales causen una denegación de servicio (NULL pointer dereference and panic) por medio de una llamada ioctl (TUNSETIFF) con un nombre de desarrollo que contiene un carácter /. Esto es similar a CVE-2013-4343.

A flaw was found in the Linux kernel's implementation of networking tunnel device ioctl. A local attacker can cause a denial of service (NULL pointer dereference and panic) via an ioctl (TUNSETIFF) call with a dev name containing a / character.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-02-17 CVE Reserved
2019-05-17 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (13)

URL	Tag	Source
http://www.securityfocus.com/bid/108380	Vdb Entry

URL	Date	SRC
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1743792	2024-08-05

URL	Date	SRC
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1748846	2019-05-31
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0ad646c81b2182f7fa67ec0c8c825e0ee165696d	2019-05-31
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5c25f65fd1e42685f7ccd80e0621829c105785d9	2019-05-31
https://github.com/torvalds/linux/commit/0ad646c81b2182f7fa67ec0c8c825e0ee165696d	2019-05-31
https://github.com/torvalds/linux/commit/5c25f65fd1e42685f7ccd80e0621829c105785d9	2019-05-31

URL	Date	SRC
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00071.html	2019-05-31
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html	2019-05-31
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html	2019-05-31
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.14	2019-05-31
https://access.redhat.com/security/cve/CVE-2018-7191	2020-07-07
https://bugzilla.redhat.com/show_bug.cgi?id=1716328	2020-07-07

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"				< 4.13.14 Search vendor "Linux" for product "Linux Kernel" and version " < 4.13.14"		-		Affected