CVE-2023-20193 : Security Advisory and Response

This CVE record describes a vulnerability in the Embedded Service Router (ESR) of Cisco Identity Services Engine (ISE) software that could potentially allow a local attacker to manipulate files on the underlying operating system and escalate their privileges to root.

Understanding CVE-2023-20193

The vulnerability in the ESR of Cisco ISE software allows an authenticated, local attacker with Administrator-level privileges to read, write, or delete arbitrary files on the affected device's operating system. Exploiting this vulnerability involves sending a crafted request to the device, which could lead to privilege escalation and unauthorized access to sensitive files.

What is CVE-2023-20193?

In CVE-2023-20193, the improper privilege management in the ESR console of Cisco ISE software allows attackers to exploit the vulnerability and gain root-level privileges, potentially compromising the integrity and confidentiality of the system.

The Impact of CVE-2023-20193

The impact of this vulnerability is rated as MEDIUM with a base CVSS score of 6.0. With a requirement of high privileges for exploitation and low complexity, an attacker could potentially cause significant harm by manipulating files, compromising data integrity and confidentiality.

Technical Details of CVE-2023-20193

This section delves into the specifics of the vulnerability, the affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability stems from improper privilege management in the ESR console of Cisco ISE software, allowing attackers to exploit the flaw and elevate their privileges to root, leading to unauthorized access and file manipulation on the affected system.

Affected Systems and Versions

Various versions of Cisco Identity Services Engine Software ranging from 2.6.0 to 3.2.0 are affected by this vulnerability. It's crucial for users of these versions to take immediate action to mitigate the risk of exploitation.

Exploitation Mechanism

To exploit CVE-2023-20193, an attacker must have valid Administrator-level privileges on the affected Cisco ISE device. By sending a specifically crafted request to the system, the attacker can execute unauthorized file operations and escalate their privileges to root.

Mitigation and Prevention

In response to CVE-2023-20193, certain steps can be taken immediately to reduce the risk of exploitation and maintain long-term security practices.

Immediate Steps to Take

Users are advised to disable the ESR if it is not in use and apply relevant patches as recommended by Cisco. Monitoring network activity for any suspicious behavior and limiting access to privileged accounts can also help mitigate the risk.

Long-Term Security Practices

Regular security assessments, employee training on cybersecurity best practices, and proactive monitoring for vulnerabilities can enhance the overall security posture of an organization, reducing the likelihood of successful attacks.

Patching and Updates

Cisco has provided patches and updates to address the vulnerability. It is critical for users of the affected versions to promptly install these patches to eliminate the risk of exploitation and secure their systems against potential threats.