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Vulnerabilities

CVE-2017-12234

Critical 🇺🇸 CISA KEV ⚡ Exploit Available
Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability — There is a vulnerability in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS coul
Published: Mar 3, 2022  ·  Source: CISA_KEV
CVSS v3
9.0
🔗 NVD Official
📄 Description (English)

Cisco IOS Software Common Industrial Protocol Request Denial-of-Service Vulnerability — There is a vulnerability in the implementation of the Common Industrial Protocol (CIP) feature in Cisco IOS could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service.

🤖 AI Executive Summary

CVE-2017-12234 is a critical denial-of-service vulnerability in Cisco IOS Software's Common Industrial Protocol (CIP) implementation that allows an unauthenticated remote attacker to cause affected devices to reload. With a CVSS score of 9.0 and known exploits available, this vulnerability poses a severe risk to industrial control systems and critical infrastructure networks relying on Cisco IOS devices with CIP enabled. The vulnerability requires no authentication, making it particularly dangerous for internet-facing or inadequately segmented industrial networks. A patch is available from Cisco and should be applied immediately.

📄 Description (Arabic)

🤖 AI Intelligence Analysis Analyzed: Apr 7, 2026 22:34
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability is particularly critical for Saudi Arabia's energy sector (ARAMCO, SABIC, SEC) and industrial facilities that extensively use Cisco IOS devices in OT/ICS environments with CIP protocol for industrial automation. Government networks managed by NCA-regulated entities using Cisco infrastructure are also at risk. Telecom providers (STC, Mobily, Zain) operating Cisco backbone equipment could face service disruptions. Water desalination plants, petrochemical facilities, and smart city infrastructure projects (NEOM, Riyadh) relying on Cisco industrial networking equipment are highly exposed. The availability of exploits combined with Saudi Arabia's status as a high-value target for nation-state actors makes this vulnerability especially dangerous.
🏢 Affected Saudi Sectors
Energy Oil & Gas Government Telecommunications Manufacturing Water & Utilities Transportation Smart Cities
⚖️ Saudi Risk Score (AI)
9.2
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all Cisco IOS devices with CIP enabled using 'show running-config | include cip'
2. Apply Cisco's security patch immediately — refer to Cisco Security Advisory cisco-sa-20170927-cip
3. If patching is not immediately possible, disable CIP on devices where it is not required: 'no cip enable'

NETWORK CONTROLS:
4. Implement ACLs to restrict CIP traffic (TCP/UDP port 44818) to only authorized industrial endpoints
5. Ensure proper network segmentation between IT and OT networks
6. Deploy IPS/IDS signatures to detect CIP exploitation attempts

DETECTION:
7. Monitor for unexpected device reloads and CIP-related crash logs
8. Implement Snort/Suricata rules for anomalous CIP traffic patterns
9. Enable syslog monitoring for %SYS-2-MALLOCFAIL and reload events

LONG-TERM:
10. Upgrade to a supported Cisco IOS version that includes the fix
11. Conduct regular vulnerability assessments of all industrial network equipment
12. Implement network monitoring for all CIP protocol communications
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع أجهزة Cisco IOS التي تم تفعيل بروتوكول CIP عليها باستخدام 'show running-config | include cip'
2. تطبيق تصحيح Cisco الأمني فوراً — الرجوع إلى نشرة Cisco الأمنية cisco-sa-20170927-cip
3. إذا لم يكن التصحيح ممكناً فوراً، قم بتعطيل CIP على الأجهزة التي لا تحتاجه: 'no cip enable'

ضوابط الشبكة:
4. تطبيق قوائم التحكم بالوصول لتقييد حركة CIP (منفذ TCP/UDP 44818) للأجهزة الصناعية المصرح بها فقط
5. ضمان التقسيم المناسب للشبكة بين شبكات تكنولوجيا المعلومات والتكنولوجيا التشغيلية
6. نشر توقيعات IPS/IDS للكشف عن محاولات استغلال CIP

الكشف:
7. مراقبة إعادة تشغيل الأجهزة غير المتوقعة وسجلات الأعطال المتعلقة بـ CIP
8. تطبيق قواعد Snort/Suricata لأنماط حركة CIP غير الطبيعية
9. تفعيل مراقبة سجلات النظام لأحداث إعادة التشغيل

على المدى الطويل:
10. الترقية إلى إصدار Cisco IOS مدعوم يتضمن الإصلاح
11. إجراء تقييمات دورية للثغرات لجميع معدات الشبكات الصناعية
12. تنفيذ مراقبة الشبكة لجميع اتصالات بروتوكول CIP
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
ECC-2:3-1 (Network Security) ECC-2:5-1 (Industrial Control Systems Security) ECC-2:2-4 (Vulnerability Management) ECC-2:3-3 (Network Segmentation)
🔵 SAMA CSF
3.3.3 (Network Security Management) 3.3.5 (Vulnerability Management) 3.3.4 (System Security) 3.4.1 (Incident Management)
🟡 ISO 27001:2022
A.8.8 (Management of technical vulnerabilities) A.8.20 (Networks security) A.8.22 (Segregation of networks) A.8.16 (Monitoring activities)
🟣 PCI DSS v4.0
6.3.3 (Patching security vulnerabilities) 11.3 (External and internal vulnerability scans) 1.3 (Network access controls)
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
Cisco:IOS software
📊 CVSS Score
9.0
/ 10.0 — Critical
📋 Quick Facts
Severity Critical
CVSS Score9.0
EPSS6.54%
Exploit ✓ Yes
Patch ✓ Yes
CISA KEV🇺🇸 Yes
KEV Due Date2022-03-24
Published 2022-03-03
Source Feed cisa_kev
Views 1
🇸🇦 Saudi Risk Score
9.2
/ 10.0 — Saudi Risk
🏷️ Tags
kev actively-exploited
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