Denial of service in Rockwell Automation 1756-EWEB and CompactLogix 1768-EWEB

1) Input validation error

EUVDB-ID: #VU17384

Risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-19016

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a crafted UDP packet to the SNMP service and cause DoS condition to occur until the affected product is restarted.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

CompactLogix 1768-EWEB: All versions

1756-EWEB: All versions

CPE2.3

• cpe:2.3:h:rockwell_automation:compactlogix_1768-eweb:*:*:*:*:*:*:*:*
• cpe:2.3:h:rockwell_automation:1756-eweb:*:*:*:*:*:*:*:*

External links

https://ics-cert.us-cert.gov/advisories/ICSA-19-036-02

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.