Huawei S5300/S5700/S6300/S6700/S7700/S9300/S9700/S12700 MPLS Packet input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in Huawei S5300, S5700, S6300, S6700, S7700, S9300, S9700 and S12700. This vulnerability affects an unknown code of the component MPLS Packet Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. CVE summarizes:

Huawei S5300 with software V200R003C00, V200R007C00, V200R008C00, V200R009C00; S5700 with software V200R001C00, V200R002C00, V200R003C00, V200R005C00, V200R005C03, V200R007C00, V200R008C00, V200R009C00; S6300 with software V200R003C00, V200R005C00, V200R008C00, V200R009C00; S6700 with software V200R001C00, V200R001C01, V200R002C00, V200R003C00, V200R005C00, V200R008C00, V200R009C00; S7700 with software V200R007C00, V200R008C00, V200R009C00; S9300 with software V200R007C00, V200R008C00, V200R009C00; S9700 with software V200R007C00, V200R008C00, V200R009C00; and S12700 with software V200R007C00, V200R007C01, V200R008C00, V200R009C00 allow the attacker to cause a denial of service condition by sending malformed MPLS packets.

The bug was discovered 11/11/2016. The weakness was presented 04/02/2017 (Website). The advisory is shared for download at This vulnerability was named CVE-2016-8773 since 10/18/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 142 days. During that time the estimated underground price was around $5k-$25k.

Upgrading eliminates this vulnerability.




CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍



VulDB Base Score: 🔍
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NVD Base Score: 🔍


Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍


10/18/2016 🔍
11/11/2016 +24 days 🔍
11/11/2016 +0 days 🔍
04/02/2017 +142 days 🔍
04/02/2017 +0 days 🔍
04/03/2017 +1 days 🔍
11/24/2022 +2061 days 🔍



Advisory: sa-20161111-01
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8773 (🔍)
SecurityFocus: 94285 - Multiple Huawei Products CVE-2016-8773 Denial of Service Vulnerability
OSVDB: - CVE-2016-8773 - Huawei - Multiple Products - Denial of Service Issue


Created: 04/03/2017 09:04 AM
Updated: 11/24/2022 02:37 PM
Changes: 04/03/2017 09:04 AM (63), 11/24/2022 02:37 PM (4)
Complete: 🔍


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