S7700 Firmware CVE-2016-2404

HIGH

Permissions, Privileges, and Access Controls (CWE-264)

2017-04-02 psirt@huawei.com

Privilege Escalation Huawei S7700 Firmware S12700 Firmware S6700 Firmware S5700 Firmware S9700 Firmware Acu2 Firmware

7.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-264 ASVS 5.0 V8 - Authorization Permission and access control MITRE ATT&CK 1 technique across 1 tactic: 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 7.5 (HIGH). Attack characteristics: network attack vector, high complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.17%.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAI

Huawei switches S5700, S6700, S7700, S9700 with software V200R001C00SPC300, V200R002C00SPC100, V200R003C00SPC300, V200R005C00SPC500, V200R006C00; S12700 with software V200R005C00SPC500, V200R006C00;. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified under CWE-264. Huawei switches S5700, S6700, S7700, S9700 with software V200R001C00SPC300, V200R002C00SPC100, V200R003C00SPC300, V200R005C00SPC500, V200R006C00; S12700 with software V200R005C00SPC500, V200R006C00; ACU2 with software V200R005C00SPC500, V200R006C00 have a permission control vulnerability. If a switch enables Authentication, Authorization, and Accounting (AAA) for permission control and user permissions are not appropriate, AAA users may obtain the virtual type terminal (VTY) access permission, resulting in privilege escalation. Affected products include: Huawei S5700 Firmware, Huawei S6700 Firmware, Huawei S7700 Firmware, Huawei S9700 Firmware, Huawei S12700 Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:H/PR:L/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

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Huawei switches S5700, S6700, S7700, S9700 with software V200R001C00SPC300, V200R002C00SPC100, V200R003C00SPC300, V200R005C00SPC500, V200R006C00; S12700 with software V200R005C00SPC500, V200R006C00; ACU2 with software V200R005C00SPC500, V200R006C00 have a permission control vulnerability. If a switch enables Authentication, Authorization, and Accounting (AAA) for permission control and user permissions are not appropriate, AAA users may obtain the virtual type terminal (VTY) access permission, resulting in privilege escalation.

Threat Intelligence Overview

EPSS Score

0.2%

Top 63% exploitable

Data Quality

3 sources

Confidence: Low

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 HIGH

CISA KEV No

Public POC No

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

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

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

No

Human Impact· derived

Medium

Priority Score

38

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Affected Products (CPE)CVE.org

cpe:2.3:o:huawei:s5700_firmware:v200r001c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s5700_firmware:v200r002c00spc100:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s5700_firmware:v200r003c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s5700_firmware:v200r005c00spc500:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s5700_firmware:v200r006c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s6700_firmware:v200r001c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s6700_firmware:v200r002c00spc100:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s6700_firmware:v200r003c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s6700_firmware:v200r005c00spc500:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s6700_firmware:v200r006c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s7700_firmware:v200r001c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s7700_firmware:v200r002c00spc100:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s7700_firmware:v200r003c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s7700_firmware:v200r005c00spc500:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s7700_firmware:v200r006c00:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s9700_firmware:v200r001c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s9700_firmware:v200r002c00spc100:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s9700_firmware:v200r003c00spc300:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s9700_firmware:v200r005c00spc500:*:*:*:*:*:*:*

cpe:2.3:o:huawei:s9700_firmware:v200r006c00:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160217-01-switch-en

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