#VU14521 Stack-based buffer overflow in MikroTik RouterOS - CVE-2018-1156

Vulnerability identifier: #VU14521

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-1156

CWE-ID: CWE-121

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 execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the license upgrade interface. A remote authenticated attacker can send a specially crafted request to the affected device, trigger stack-based buffer overflow and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

MikroTik RouterOS: 6.40.1 - 6.40.8, 6.41.1 - 6.41.4, 6.42.1 - 6.42.6

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External links
https://mikrotik.com/download/changelogs

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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