Dell Connectrix MDS series update for Cisco bootloader vulnerability

1) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU101221

Risk: Low

CVSSv4.0: 4 [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/E:U/U:Clear]

CVE-ID: CVE-2024-20397

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Connectrix MDS series: before 9.4(2a)

CPE2.3

• cpe:2.3:h:dell:connectrix_mds_series:*:*:*:*:*:*:*:*

External links

https://www.dell.com/support/kbdoc/nl-nl/000261082/dsa-2025-023-security-update-for-dell-connectrix-mds-cisco-bootloader-vulnerability
https://www.dell.com/support/home/nl-nl/product-support/product/connectrix-mds-series-hardware/drivers

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.