CVE-2017-18360

kernel: Division by zero in change_port_settings in drivers/usb/serial/io_ti.c resulting in a denial of service

Severity Score

5.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In change_port_settings in drivers/usb/serial/io_ti.c in the Linux kernel before 4.11.3, local users could cause a denial of service by division-by-zero in the serial device layer by trying to set very high baud rates.

En change_port_settings en drivers/usb/serial/io_ti.c en el kernel de Linux, en versiones anteriores a la 4.11.3, los usuarios locales podrían provocar una denegación de servicio (DoS) por medio de una división entre cero en la capa del dispositivo en serie intentando establecer tasas de baudio muy altas.

A division-by-zero in set_termios(), when debugging is enabled, was found in the Linux kernel. When the [io_ti] driver is loaded, a local unprivileged attacker can request incorrect high transfer speed in the change_port_settings() in the drivers/usb/serial/io_ti.c so that the divisor value becomes zero and causes a system crash resulting in a denial of service.

*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

High

Privileges Required

Low

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

2019-01-31 CVE Reserved
2019-01-31 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-369: Divide By Zero

CAPEC

References (9)

URL	Tag	Source
http://www.securityfocus.com/bid/106802	Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1123706	Issue Tracking

URL	Date	SRC

URL	Date	SRC
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6aeb75e6adfaed16e58780309613a578fe1ee90b	2019-04-17
https://github.com/torvalds/linux/commit/6aeb75e6adfaed16e58780309613a578fe1ee90b	2019-04-17

URL	Date	SRC
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3	2019-04-17
https://usn.ubuntu.com/3933-1	2019-04-17
https://usn.ubuntu.com/3933-2	2019-04-17
https://access.redhat.com/security/cve/CVE-2017-18360	2018-10-30
https://bugzilla.redhat.com/show_bug.cgi?id=1671343	2018-10-30

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"				< 4.11.3 Search vendor "Linux" for product "Linux Kernel" and version " < 4.11.3"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		esm		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected