Zero-day vulnerability in MikroTik RouterOS

Improper authentication
CVE-2018-14847

The vulnerability was exploited against a very limited number of targets.

Vulnerability details

Advisory: SB2018042420 - Authentication bypass in MikroTik RouterOS

Vulnerable component: MikroTik RouterOS

CVE-ID: CVE-2018-14847

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-287 - Improper Authentication

Description:

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to improper authentication in the exposed by default Winbox interface on port 8291/TCP. A remote attacker can send specially crafted packets to the affected service, bypass authentication, download local database with user accounts and gain full access to the vulnerable device.

Successful exploitation of the vulnerability may result in system compromise.

Note: this vulnerability has being exploited in the wild in April 2018.

Public Exploits:

- Mikrotik WinBox 6.42 - Credential Disclosure (golang) [Exploit-DB]

- MicroTik RouterOS < 6.43rc3 - Remote Root [Exploit-DB]

External links:

https://www.bleepingcomputer.com/news/security/mikrotik-patches-zero-day-flaw-under-attack-in-record...

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.