Vulnerability identifier: #VU22425

Vulnerability risk: Low

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3977

CWE-ID: CWE-345

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MikroTik RouterOS
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: MikroTik

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to software does not validate origin of the upgrade packages when using autoupgrade feature. A remote attacker can trick the victim into downloading and installing an old version of RouterOS and reset passwords of all system users.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.45.1 - 6.45.6, 6.44.1 - 6.44.5

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External links
http://mikrotik.com/download/changelogs#6.45.7
http://www.tenable.com/security/research/tra-2019-46

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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