What is the CVSS score of CVE-2018-3657?

CVE-2018-3657 has a CVSS 3.1 base score of 6.7 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.6%.

Is there a patch available for CVE-2018-3657?

Yes, a patch is available for CVE-2018-3657. Update the affected software to the latest version immediately.

Simatic Itp1000 Firmware CVE-2018-3657

MEDIUM

Buffer Overflow (CWE-119)

2018-09-12 secure@intel.com

RCE Buffer Overflow Siemens Intel Simatic Itp1000 Firmware Simatic Ipc847D Firmware Simatic Ipc827D Firmware Simatic Ipc677D Firmware Simatic Ipc647D Firmware Simatic Ipc627D Firmware Simatic Ipc547E Firmware Simatic Ipc477E Firmware Simatic Field Pg M5 Firmware Simatic Ipc427E Firmware Active Management Technology Firmware Manageability Engine Firmware Converged Security Management Engine Firmware Simatic Pc547G Firmware

6.7

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-119 ASVS 5.0 V15 - Secure Coding and Architecture Bounds checking, buffer size validation MITRE ATT&CK 2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.7 (MEDIUM). Attack characteristics: local attack vector, low complexity, high privileges required, no user interaction not required.
Exploit ScenarioDerived	A local attacker with access to the system could corrupt memory to execute arbitrary code or crash the application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 0.6% exploitation probability (EPSS)

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AnalysisAI

Multiple buffer overflows in Intel AMT in Intel CSME firmware versions before version 12.0.5 may allow a privileged user to potentially execute arbitrary code with Intel AMT execution privilege via. Rated medium severity (CVSS 6.7), this vulnerability is low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Buffer Overflow (CWE-119), which allows attackers to corrupt memory to execute arbitrary code or crash the application. Multiple buffer overflows in Intel AMT in Intel CSME firmware versions before version 12.0.5 may allow a privileged user to potentially execute arbitrary code with Intel AMT execution privilege via local access. Affected products include: Siemens Simatic Field Pg M5 Firmware, Siemens Simatic Ipc427E Firmware, Siemens Simatic Ipc477E Firmware, Siemens Simatic Ipc547E Firmware, Siemens Simatic Pc547G Firmware. Version information: version 12.0.5.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.7 MEDIUM

AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

Threat Intelligence Overview

EPSS Score

0.6%

Top 56% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.6%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +34

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:o:siemens:simatic_field_pg_m5_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc427e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc477e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc547e_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_pc547g_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc627d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc647d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc677d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc827d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_ipc847d_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:siemens:simatic_itp1000_firmware:*:*:*:*:*:*:*:*

cpe:2.3:a:intel:converged_security_management_engine_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:intel:active_management_technology_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:intel:manageability_engine_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://cert-portal.siemens.com/productcert/pdf/ssa-377318.pdf ADVISORY https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00141.html REF http://www.securityfocus.com/bid/106996 REF https://ics-cert.us-cert.gov/advisories/ICSA-19-043-05 REF https://security.netapp.com/advisory/ntap-20180924-0003/ REF https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03876en_us

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