CVE-2021-34728 : Security Advisory and Response

Cisco IOS XR Software is affected by multiple vulnerabilities that could allow an authenticated, local attacker with a low-privileged account to elevate privileges on the device.

Understanding CVE-2021-34728

This CVE ID refers to the authenticated user privilege escalation vulnerabilities in Cisco IOS XR Software.

What is CVE-2021-34728?

Multiple vulnerabilities in the CLI of Cisco IOS XR Software allow an authenticated, local attacker with a low-privileged account to escalate privileges on the affected device.

The Impact of CVE-2021-34728

The vulnerabilities have a CVSS base score of 7.8, indicating a high impact on confidentiality, integrity, and availability of the system. The attack complexity is low, but the privileges required are low as well.

Technical Details of CVE-2021-34728

These are the technical details of the CVE-2021-34728 vulnerability.

Vulnerability Description

The vulnerabilities allow an authenticated, local attacker to elevate privileges on the affected Cisco IOS XR Software.

Affected Systems and Versions

The affected product is Cisco IOS XR Software, with the version information not available.

Exploitation Mechanism

An authenticated, local attacker with low-privileged account access can exploit these vulnerabilities to escalate their privileges on the device.

Mitigation and Prevention

To address CVE-2021-34728, consider the following mitigation strategies.

Immediate Steps to Take

Cisco recommends reviewing and applying the necessary updates and patches provided by the vendor as soon as possible to mitigate the risk.

Long-Term Security Practices

Implement strong access control measures, regular security assessments, and monitoring to detect and prevent unauthorized access attempts.

Patching and Updates

Regularly check for security updates and advisories from Cisco. Apply patches promptly to ensure that your systems are protected against known vulnerabilities.