Vulnerability identifier: #VU333

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-119

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 when handling user-supplied input in sshd service. A remote unauthenticated attacker can send specially crafted packets to vulnerable sshd service, trigger heap corruption and cause denial of service or execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable device.

Mitigation
Update to the latest firmware version.

Vulnerable software versions

MikroTik RouterOS:

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External links
http://kingcope.wordpress.com/2013/09/02/mikrotik-routeros-5-and-6-sshd-remote-preauth-heap-corrupt...

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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. However, proof of concept for this vulnerability is available.