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Fencer Intel
medium 5.0

CVE-2011-3489 json

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) vi…

published 2011-09-16 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3452

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.7%
EPSS 8.7% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-11-273-03A updated cvss 5.0

Rockwell RSLogix Overflow Vulnerability

  • Rockwell Automation All FactoryTalk-branded software of specific CPR9, >=CPR9-SR1, <=CPR9-SR4 Rockwell Automation RSLogix 5000 software 17, 18, 19
    affected: mitigation “For full patching instructions and additional information, refer to Rockwell Automation Security Advisory KB 456144. (http://rockwellautomation.custhelp.com/app/answers/detail/a_id/456144)”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

  1. First public exploit (EDB-17843)
  2. Published

Exploit prediction

8.75% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-17843 Rockwell RSLogix 19 - Denial of Service dos, 2011-09-14
  • aluigi.altervista.org http://aluigi.altervista.org/adv/rslogix_1-adv.txt referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.