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MEDIUM · 6.7

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 softwar...

Vulnerability Description

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.

CVSS Score

6.7

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
CiscoIos Xr24.2.1
Cisco8011-4G24Y4H-I-
Cisco8101-32Fh-
Cisco8101-32Fh-O-
Cisco8101-32H-O-
Cisco8102-28Fh-Dpu-O-
Cisco8102-64H-
Cisco8102-64H-O-
Cisco8111-32Eh-O-
Cisco8122-64Eh-O-
Cisco8122-64Ehf-O-
Cisco8201-
Cisco8201-24H8Fh-
Cisco8201-32Fh-
Cisco8201-32Fh-O-
Cisco8202-
Cisco8202-32Fh-M-
Cisco8212-48Fh-M-
Cisco8404-
Cisco8501-Sys-Mt-

Related Weaknesses (CWE)

CWE-732

References

FAQ

What is CVE-2024-20456?

CVE-2024-20456 is a vulnerability with a CVSS score of 6.7 (MEDIUM). 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 softwar...

How severe is CVE-2024-20456?

CVE-2024-20456 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2024-20456?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Ios Xr, Cisco 8011-4G24Y4H-I, Cisco 8101-32Fh, Cisco 8101-32Fh-O, Cisco 8101-32H-O.