Description
RnaUtility.dll in RsvcHost.exe 2.30.0.23 in Rockwell RSLogix 19 and earlier allows remote attackers to cause a denial of service (crash) via a crafted rna packet with a long string to TCP port 4446 that triggers (1) "a memset zero overflow" or (2) an out-of-bounds read, related to improper handling of a 32-bit size field.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Rockwell RSLogix 19 - Denial of Service EDB-17843 · dos · Sep 14, 2011
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- ICSA-11-273-03A Rockwell RSLogix Overflow Vulnerability CISA ICS & IT advisories · Jun 5, 2025
References
- rslogix-rna-dos(69808) vdb-entry
- 8383 third-party-advisory
- 49608 vdb-entry
- http://aluigi.altervista.org/adv/rslogix_1-adv.txt