#VU17344 Division by zero in Linux kernel - CVE-2017-18360

Vulnerability identifier: #VU17344

Vulnerability risk: Low

CVSSv4.0: 5.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: CVE-2017-18360

CWE-ID: CWE-369

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows a local attacker to cause DoS condition.

The weakness exists due to a division-by-zero condition in the change_port_settings function, as defined in the drivers/usb/serial/io_ti.c source code file. A local attacker can maliciously set high baud rates and cause the targeted system to crash

Mitigation
Update to version 4.11.3.

Vulnerable software versions

Linux kernel: 4.10.0 - 4.11.2

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External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6aeb75e6adfaed16e58780309613a578fe1ee90b
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.3
https://github.com/torvalds/linux/commit/6aeb75e6adfaed16e58780309613a578fe1ee90b

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.