Denial of service in MikroTik RouterOS
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-11881 |
| CWE-ID | CWE-129 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
MikroTik RouterOS Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | MikroTik |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated 21.09.2020
Added fixed version.
1) Improper Validation of Array Index
EUVDB-ID: #VU46736
Risk: Medium
CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2020-11881
CWE-ID:
CWE-129 - Improper Validation of Array Index
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform denial of service attack.
The vulnerability exists due to improper validation of array index when processing setup-requests in a built-in SMB server. A remote non-authenticated attacker can send specially crafted setup-request packets and crash the SMB server.
Install updates from vendor's website.
Vulnerable software versionsMikroTik RouterOS: 6.41.3 - 6.47.3
External linkshttp://github.com/botlabsDev/CVE-2020-11881
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
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. However, proof of concept for this vulnerability is available.
