No exploitation reported

CVE-2017-9312

No exploitation reported by the sources we read.

Published2018-06-25
WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Improperly implemented option-field processing in the TCP/IP stack on Allen-Bradley L30ERMS safety devices v30 and earlier causes a denial of service. When a crafted TCP packet is received, the device reboots immediately.

Timeline

dates in UTC

2018-06-2515:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-9312?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-9312?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Rockwellautomation allen-bradley l30erms firmwareversion to verify

Branch	Affected	Fixed in	Source
30.x	≤ 30	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-18-172-02 CISA6 known affected
Rockwell Automation Allen-Bradley CompactLogix and Compact GuardLogix (Update A)
Allen-Bradley CompactLogix 5370 L2 controllers: Versions 30.014 and prior · Allen-Bradley CompactLogix 5370 L1 controllers: Versions 30.014 and prior · Allen-Bradley Armor Compact GuardLogix 5370 controllers: Versions 30.014 and prior · +3 more

Full record on NVD

Fix

Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsRockwell Automation recommends users with affected controllers apply firmware revision FRN (31.011 or later) to the affected products. The download can be obtained at the following location:
Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsBlock all traffic to Ethernet/IP or other CIP protocol-based devices from outside the Manufacturing Zone by blocking or restricting access to Port 2222/TCP and UDP and Port 44818/TCP and UDP using proper network infrastructure controls, such as firewalls, UTM devices, or other security appliances. …
Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsMinimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet.
Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsWhen remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.
Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsWhen possible, users are recommended to apply the firmware revision in conjunction with the general security guidelines to employ multiple strategies simultaneously.
Mitigation from the vendor CISA ICSA-18-172-02 · 6 productsFor more information on this vulnerability and more detailed mitigation instructions, please access an account in order to view Rockwell Automation's advisory at the following location:

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.07.8read 2026-10-23
NVDweakness (CWE)CWE-20read 2026-10-23
FIRST EPSSEPSS score4.4 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-06-25
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-9312?

Is CVE-2017-9312 actively exploited?

Active exploitation of CVE-2017-9312 has not been confirmed. Its EPSS score was 4.4% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-9312?

CVE-2017-9312 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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