Vulnerability Monitor

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CVE-2024-20456


A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Cisco Secure Boot functionality and load unverified software on an affected device. To exploit this successfully, the attacker must have root-system privileges on the affected device. This vulnerability is due to an error in the software build process. An attacker could exploit this vulnerability by manipulating the system’s configuration options to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass of the requirement to run Cisco signed images or alter the security properties of the running system.


Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.7, requiring local system access to exploit with relatively low complexity without requiring user interaction . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 59 products from cisco, from cisco, from cisco and 56 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2024, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2024-07-10T16:15:03.703

Last Modified

2025-08-04T17:44:16.417

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 6.7 (MEDIUM)

Weaknesses
  • Type: Secondary
    CWE-732

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios_xr 24.2.1 Yes
Hardware cisco 8011-4g24y4h-i - No
Hardware cisco 8101-32fh - No
Hardware cisco 8101-32fh-o - No
Hardware cisco 8101-32h-o - No
Hardware cisco 8102-28fh-dpu-o - No
Hardware cisco 8102-64h - No
Hardware cisco 8102-64h-o - No
Hardware cisco 8111-32eh-o - No
Hardware cisco 8122-64eh-o - No
Hardware cisco 8122-64ehf-o - No
Hardware cisco 8201 - No
Hardware cisco 8201-24h8fh - No
Hardware cisco 8201-32fh - No
Hardware cisco 8201-32fh-o - No
Hardware cisco 8202 - No
Hardware cisco 8202-32fh-m - No
Hardware cisco 8212-48fh-m - No
Hardware cisco 8404 - No
Hardware cisco 8501-sys-mt - No
Hardware cisco 8608 - No
Hardware cisco 8700 - No
Hardware cisco 8711-32fh-m - No
Hardware cisco 8712-mod-m - No
Hardware cisco 8804 - No
Hardware cisco 8808 - No
Hardware cisco 8812 - No
Hardware cisco 8818 - No
Hardware cisco ncs_1010 - No
Hardware cisco ncs_1014 - No
Hardware cisco ncs_540-12z20g-sys-a - No
Hardware cisco ncs_540-12z20g-sys-d - No
Hardware cisco ncs_540-24q2c2dd-sys - No
Hardware cisco ncs_540-24q8l2dd-sys - No
Hardware cisco ncs_540-24z8q2c-sys - No
Hardware cisco ncs_540-28z4c-sys-a - No
Hardware cisco ncs_540-28z4c-sys-d - No
Hardware cisco ncs_540-6z14s-sys-d - No
Hardware cisco ncs_540-6z18g-sys-a - No
Hardware cisco ncs_540-6z18g-sys-d - No
Hardware cisco ncs_540-acc-sys - No
Hardware cisco ncs_540-fh-agg - No
Hardware cisco ncs_540-fh-csr-sys - No
Hardware cisco ncs_540x-12z16g-sys-a - No
Hardware cisco ncs_540x-12z16g-sys-d - No
Hardware cisco ncs_540x-16z4g8q2c-a - No
Hardware cisco ncs_540x-16z4g8q2c-d - No
Hardware cisco ncs_540x-16z8q2c-d - No
Hardware cisco ncs_540x-4z14g2q-a - No
Hardware cisco ncs_540x-4z14g2q-d - No
Hardware cisco ncs_540x-6z18g-sys-a - No
Hardware cisco ncs_540x-6z18g-sys-d - No
Hardware cisco ncs_540x-8z16g-sys-a - No
Hardware cisco ncs_540x-8z16g-sys-d - No
Hardware cisco ncs_540x-acc-sys - No
Hardware cisco ncs_57b1-5dse-sys - No
Hardware cisco ncs_57b1-6d24-sys - No
Hardware cisco ncs_57c1-48q6-sys - No
Hardware cisco ncs_57d2-18dd-sys - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.