CVE-2019-1732: Cisco NX-OS Software Remote Package Manager Command Injection Vulnerability

Severity: medium (CVSS 6.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-15 · updated 2026-06-17
Weakness: CWE-78

Description

A vulnerability in the Remote Package Manager (RPM) subsystem of Cisco NX-OS Software could allow an authenticated, local attacker with administrator credentials to leverage a time-of-check, time-of-use (TOCTOU) race condition to corrupt local variables, which could lead to arbitrary command injection. The vulnerability is due to the lack of a proper locking mechanism on critical variables that need to stay static until used. An attacker could exploit this vulnerability by authenticating to an affected device and issuing a set of RPM-related CLI commands. A successful exploit could allow the attacker to perform arbitrary command injection. The attacker would need administrator credentials for the targeted device.

Affected products

Cisco NX-OS: from 7.0\(3\)i4 before 7.0\(3\)i7\(4\) — fixed in 7.0\(3\)i7\(4\)
Cisco Nx Os: from 7.0\(3\) before 7.0\(3\)f3\(5\) — fixed in 7.0\(3\)f3\(5\)

How to fix

Upgrade to a fixed version: Cisco NX-OS 7.0\(3\)i7\(4\); Cisco Nx Os 7.0\(3\)f3\(5\). Check the vendor advisory for mitigations.

References

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