#VU78271 Out-of-bounds write in Rockwell Automation products - CVE-2023-3595

Vulnerability identifier: #VU78271

Vulnerability risk: Critical

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red

CVE-ID: CVE-2023-3595

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerable software:
1756-EN2T Series A
1756-EN2T Series B
1756-EN2T Series C
1756-EN2T Series D
1756-EN2TR Series A
1756-EN2TR Series B
1756-EN2TR Series C
1756-EN2F Series A
1756-EN2F Series C
1756-EN3TR Series A
1756-EN3TR Series B
1756-EN2TK Series A
1756-EN2TK Series B
1756-EN2TK Series C
1756-EN2TK Series D
1756-EN2TXT Series A
1756-EN2TXT Series B
1756-EN2TXT Series C
1756-EN2TXT Series D
1756-EN2TP Series A
1756-EN2TPK Series A
1756-EN2TPXT Series A
1756-EN2TRK Series A
1756-EN2TRK Series B
1756-EN2TRK Series C
1756-EN2TRXT Series A
1756-EN2TRXT Series C
1756-EN2FK Series A
1756-EN2FK Series C
1756-EN3TRK Series A
1756-EN3TRK Series B

Software vendor:
Rockwell Automation

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing CIP messages. A remote attacker can send specially crafted CIP messages to ports 44818/TCP or 2222/UDP, trigger an out-of-bounds write and execute arbitrary code.

Note, the vulnerability is most likely being exploited in the wild.

Install updates from vendor's website.

• https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1140010
• https://www.bleepingcomputer.com/news/security/rockwell-warns-of-new-apt-rce-exploit-targeting-critical-infrastructure/
• https://www.cisa.gov/news-events/ics-advisories/icsa-23-193-01