CVE intelligence and bounded remediation

CVE-2020-3377 — Cisco Data Center Network Manager security vulnerability

High CVSS 8.8

A vulnerability in the Device Manager application of Cisco Data Center Network Manager (DCNM) could allow an authenticated, remote attacker to inject arbitrary commands on the affected device. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending crafted arguments to a specific field within the application. A successful exploit could allow the attacker to run commands as the administrator on the DCNM.

Severity
High
CVSS
8.8 (3.1)
Published
2020-07-31
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-78

Affected products

  • cisco / data_center_network_manager / 11.0(1)
  • cisco / data_center_network_manager / 11.1(1)
  • cisco / data_center_network_manager / 11.2(1)
  • cisco / data_center_network_manager / 11.3(1)

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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