CVE-2019-1732: cisco cisco nx-os software OS Command Injection

Vulnerability summary

CVE-2019-1732 is a medium (CVSS 6.9) OS Command Injection vulnerability in cisco cisco nx-os software. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 28.1% of scored vulnerabilities.

Timeline

1. 15-05-2019
   PublishedVulnerability first disclosed.
2. 20-11-2024
   Last modifiedVulnerability information updated.

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.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
• CWE-667Improper LockingThe product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.