Authentication bypass in Mikrotik RouterOS

1) Improper Authentication

EUVDB-ID: #VU24728

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error when loading default router configuration for routers with default admin password and Wireless Wire enabled. A remote attacker on the local network can login with admin account and empty password before the default configuration is fully loaded.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.45 - 6.46.1

External links

http://mikrotik.com/download/changelogs/long-term-release-tree#6.45.8

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.