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Vulnerability Assessment

Weakness
CWE
CWE-399
Impact

CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.24%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAI

Memory leak in Huawei S5300EI, S5300SI, S5310HI, and S6300EI Campus series switches with software V200R003C00 before V200R003SPH011 and V200R005C00 before V200R005SPH008; S2350EI and S5300LI Campus. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. 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.

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Technical ContextAI · show details

This vulnerability is classified under CWE-399. Memory leak in Huawei S5300EI, S5300SI, S5310HI, and S6300EI Campus series switches with software V200R003C00 before V200R003SPH011 and V200R005C00 before V200R005SPH008; S2350EI and S5300LI Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH008, and V200R006C00 before V200R006SPH002; S9300, S7700, and S9700 Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH009, and V200R006C00 before V200R006SPH003; S5720HI and S5720EI Campus series switches with software V200R006C00 before V200R006SPH002; and S2300 and S3300 Campus series switches with software V100R006C05 before V100R006SPH022 allows remote authenticated users to cause a denial of service (memory consumption and device restart) by logging in and out of the (1) HTTPS or (2) SFTP server, related to SSL session information. Affected products include: Huawei S5300Ei Firmware, Huawei S5300Si Firmware, Huawei S5310Hi Firmware, Huawei S6300Ei Firmware, Huawei S5300Li Firmware.

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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

DescriptionCVE.org

Memory leak in Huawei S5300EI, S5300SI, S5310HI, and S6300EI Campus series switches with software V200R003C00 before V200R003SPH011 and V200R005C00 before V200R005SPH008; S2350EI and S5300LI Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH008, and V200R006C00 before V200R006SPH002; S9300, S7700, and S9700 Campus series switches with software V200R003C00 before V200R003SPH011, V200R005C00 before V200R005SPH009, and V200R006C00 before V200R006SPH003; S5720HI and S5720EI Campus series switches with software V200R006C00 before V200R006SPH002; and S2300 and S3300 Campus series switches with software V100R006C05 before V100R006SPH022 allows remote authenticated users to cause a denial of service (memory consumption and device restart) by logging in and out of the (1) HTTPS or (2) SFTP server, related to SSL session information.

Threat Intelligence Overview

EPSS Score
0.2%
Top 53% 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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
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
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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:s5300ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300si_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300si_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5310hi_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5310hi_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s6300ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s6300ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300li_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300li_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s5300li_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s2350ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s2350ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s2350ei_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9700_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:huawei:s9700_firmware:*:*:*:*:*:*:*:*
+ 7 more

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Huawei Quidway S9700, S5700, S5300, S9300, and S7700 switches with software before V200R003SPH012 allow remote attackers
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Same weakness CWE-399 – Resource Management Errors

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CVE-2013-3893 HIGH POC
8.8
CVE-2013-0025 CRITICAL POC
9.3
CVE-2015-0064 CRITICAL POC
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CVE-2015-0065 CRITICAL POC
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CVE-2013-3846 CRITICAL POC
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CVE-2016-5427 HIGH
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CVE-2013-0233 MEDIUM POC
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CVE-2013-1305 HIGH
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Same technique Denial Of Service

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CVE-2015-5119 CRITICAL POC
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CVE-2011-2462 CRITICAL POC
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CVE-2011-0611 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8
CVE-2012-0507 CRITICAL POC
9.8
CVE-2014-1761 HIGH POC
7.8
CVE-2015-5122 CRITICAL POC
9.8
CVE-2011-0609 HIGH POC
7.8

References

Advisories & patches
ADVISORY http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160113-03-switch-en

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