#VU78272 Out-of-bounds write in Rockwell Automation products - CVE-2023-3596

Vulnerability identifier: #VU78272

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-2023-3596

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
1756-EN4TR Series A
Server applications / SCADA systems
1756-EN4TRK Series A
Server applications / SCADA systems
1756-EN4TRXT Series A
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 a boundary error when processing CIP messages. A remote attacker can send specially crafted CIP messages to the affected system, trigger an out-of-bounds write and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

1756-EN4TR Series A: before 5.002

1756-EN4TRK Series A: before 5.002

1756-EN4TRXT Series A: before 5.002

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External links
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010
https://www.cisa.gov/news-events/ics-advisories/icsa-23-193-01

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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.