Denial of service in Rockwell Automation MicroLogix 1100
| Risk | Medium |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-33012 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Allen-Bradley MicroLogix 1100 Hardware solutions / Office equipment, IP-phones, print servers |
| Vendor | Rockwell Automation |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU54631
Risk: Medium
CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-33012
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the PLC when the controller is switched to RUN mode. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsAllen-Bradley MicroLogix 1100: All versions
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-189-01
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.
