CVE-2018-0301: cisco nx-os Improper Input Validation
Vulnerability summary
CVE-2018-0301 is a high (CVSS 10.0) Improper Input Validation vulnerability in cisco nx-os. EPSS estimates a 17.04% chance of exploitation in the next 30 days, higher than 97% of scored vulnerabilities.
Timeline
- 20-06-2018PublishedVulnerability first disclosed.
- 29-11-2024Last modifiedVulnerability information updated.
Description
A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to craft a packet to the management interface on an affected system, causing a buffer overflow. The vulnerability is due to incorrect input validation in the authentication module of the NX-API subsystem. An attacker could exploit this vulnerability by sending a crafted HTTP or HTTPS packet to the management interface of an affected system with the NX-API feature enabled. An exploit could allow the attacker to execute arbitrary code as root. Note: NX-API is disabled by default. This vulnerability affects: MDS 9000 Series Multilayer Switches, Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 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. Cisco Bug IDs: CSCvd45804, CSCve02322, CSCve02412.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
17.04%
Chance of exploitation in the next 30 days
Percentile
97%
Versus all other CVEs
30-day change
0.00 pp
From 17.04% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe 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.
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
Affected systems
Cisco1 product
- nx-os≥ 6.0, < 7.3\(3\)n1\(1\) | ≥ 7.2, < 7.3\(2\)d1\(1\) | ≥ 8.0, < 8.1\(1\) | 8.1 | 8.2 | < 7.0\(3\)i4 | ≥ 7.0\(3\)i5, < 7.0\(3\)i7\(1\) | 7.0\(3\)i7 | ≥ 7.3, < 7.3\(3\)n1\(1\) | 6.0 | 7.0 | 7.1 | 7.2 | ≥ 7.3, < 8.1\(1\) | 5.2 | 6.2
1 vendor · 1 product
References
3 links- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180620-nxos-boX Refsource CONFIRMVendor Advisory