What is the CVSS score of CVE-2016-4576?

CVE-2016-4576 has a CVSS 3.0 base score of 9.8 (Critical). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 2.3%.

Nip6300 Firmware CVE-2016-4576

CRITICAL

Buffer Overflow (CWE-119)

2016-05-23 cve@mitre.org

RCE Buffer Overflow Denial Of Service Huawei Nip6300 Firmware Secospace Usg6500 Firmware Secospace Antiddos8000 Firmware Usg9500 Firmware Secospace Usg6300 Firmware Ngfw Module Firmware Secospace Usg6600 Firmware Nip6600 Firmware Ips Module Firmware

9.8

CVSS 3.0 · 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 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 2.35%.
Exploit ScenarioDerived	A remote attacker could corrupt memory to execute arbitrary code or crash the application by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 2.3% exploitation probability (EPSS)

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AnalysisAI

Buffer overflow in the Application Specific Packet Filtering (ASPF) functionality in the Huawei IPS Module, NGFW Module, NIP6300, NIP6600, Secospace USG6300, USG6500, USG6600, USG9500, and. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use memory-safe languages or bounds-checking. Enable ASLR, DEP/NX, stack canaries. Use safe string functions.

Affects your stack

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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. Buffer overflow in the Application Specific Packet Filtering (ASPF) functionality in the Huawei IPS Module, NGFW Module, NIP6300, NIP6600, Secospace USG6300, USG6500, USG6600, USG9500, and AntiDDoS8000 devices with software before V500R001C20SPC100 allows remote attackers to cause a denial of service or execute arbitrary code via a crafted packet, related to "illegitimate parameters." Affected products include: Huawei Nip6300 Firmware, Huawei Secospace Usg6500 Firmware, Huawei Secospace Antiddos8000 Firmware, Huawei Usg9500 Firmware, Huawei Secospace Usg6300 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Buffer overflow in the Application Specific Packet Filtering (ASPF) functionality in the Huawei IPS Module, NGFW Module, NIP6300, NIP6600, Secospace USG6300, USG6500, USG6600, USG9500, and AntiDDoS8000 devices with software before V500R001C20SPC100 allows remote attackers to cause a denial of service or execute arbitrary code via a crafted packet, related to "illegitimate parameters."

Threat Intelligence Overview

EPSS Score

2.3%

Top 15% exploitable

Data Quality

3 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 CRITICAL

CISA KEV No

Public POC No

EPSS 2.3%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +49

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.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)CVE.org

cpe:2.3:o:huawei:nip6300_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:secospace_usg6500_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:secospace_antiddos8000_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:usg9500_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:secospace_usg6300_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ngfw_module_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:secospace_usg6600_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:nip6600_firmware:v500r001c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:ips_module_firmware:v500r001c00:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160511-01-aspf-en REF http://www.securityfocus.com/bid/90530

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GitHub PoC

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