VDB-119742 · CVE-2018-0291 · Qualys 316280

Cisco NX-OS SNMP input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Cisco NX-OS (Router Operating System) (version unknown). It has been classified as problematic. Affected is an unknown function of the component SNMP. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the Simple Network Management Protocol (SNMP) input packet processor of Cisco NX-OS Software could allow an authenticated, remote attacker to cause the SNMP application on an affected device to restart unexpectedly. The vulnerability is due to improper validation of SNMP protocol data units (PDUs) in SNMP packets. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device. A successful exploit could allow the attacker to cause the SNMP application to restart multiple times, leading to a system-level restart and a denial of service (DoS) condition. This vulnerability affects Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules, UCS 6100 Series Fabric Interconnects, UCS 6200 Series Fabric Interconnects, UCS 6300 Series Fabric Interconnects. Cisco Bug IDs: CSCuw99630, CSCvg71290, CSCvj67977.

The bug was discovered 06/20/2018. The weakness was disclosed 06/20/2018 as cisco-sa-20180620-nxossnmp / CSCvj67977 as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2018-0291 since 11/27/2017. It is possible to launch the attack remotely. The successful exploitation requires a authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/28/2023).

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316280 (Cisco NX-OS Software Authenticated Simple Network Management Protocol Denial of Service Vulnerability(cisco-sa-20180620-nxossnmp)).

It is possible to mitigate the weakness by firewalling .

The entries 119746, 119743 and 119744 are pretty similar.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
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: 🔍


Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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


Recommended: Firewall
Status: 🔍


11/27/2017 🔍
06/20/2018 +204 days 🔍
06/20/2018 +0 days 🔍
06/20/2018 +0 days 🔍
06/21/2018 +1 days 🔍
03/28/2023 +1741 days 🔍


Vendor: cisco.com

Advisory: cisco-sa-20180620-nxossnmp / CSCvj67977
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0291 (🔍)
SecurityTracker: 1041169

See also: 🔍


Created: 06/21/2018 08:27 AM
Updated: 03/28/2023 10:15 AM
Changes: 06/21/2018 08:27 AM (61), 02/20/2020 07:31 PM (2), 03/28/2023 10:15 AM (3)
Complete: 🔍


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