#VU48646 Input validation error in FactoryTalk Linx - CVE-2020-27253

Vulnerability identifier: #VU48646

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-27253

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FactoryTalk Linx
Server applications / SCADA systems

Vendor: Rockwell Automation

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 in the Ingress/Egress checks routine. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FactoryTalk Linx: 6.11

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-329-01

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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.