Denial of service in Linux Kernel

1) Type confusion

EUVDB-ID: #VU15458

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-18386

CWE-ID: CWE-843 - Type confusion

Exploit availability: No

Description

The vulnerability allows a local attacker to cause DoS condition on the target system.

The vulnerability exists due to a type confusion condition in the drivers/tty/n_tty.csource code file. A local attacker can deny use of any other pseudoterminal devices on a targeted system when the EXTPROC and ICANON flags become confused in the TIOCINQ command.

Mitigation

Update to version 4.14.11.

Vulnerable software versions

Linux kernel: 4.10.0 - 4.14.10

External links

http://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11

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.