Improper Verification of Cryptographic Signature in Cisco UCS Manager and Cisco NX-OS - CVE-2024-20397

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Main Vulnerability Database Vulnerabilities #VU101221

Improper Verification of Cryptographic Signature in Cisco UCS Manager and Cisco NX-OS - CVE-2024-20397

Published: December 4, 2024


Vulnerability identifier: #VU101221
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:P/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2024-20397
CWE-ID: CWE-347
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to bypass implemented security restrictions.

The vulnerability exists due to improper signature verification in the bootloader. An attacker with physical access to device or a user with administrative privileges can bypass NX-OS image signature verification and load unverified software.


Affected software

Cisco UCS Manager
Cisco NX-OS
Connectrix MDS series

How to mitigate CVE-2024-20397

Install updates from vendor's website.

Cisco UCS Manager - addressed in versions 4.1(3n), 4.2(3n), 4.3(4a)
Cisco NX-OS - addressed in versions 8.4(10), 9.3(13), 9.3(14) SMU, 9.4(2), 10.2(7), 10.2(8) SMU, 10.3(5), 10.3(6) SMU, 10.4(2), 10.4(4) SMU, 10.5(2), 15.3(2e), 16.0(4c), 16.0(8f), 16.1(2)
Connectrix MDS series - update to 9.4(2a)

External References

Related Security Bulletins