SB2024120435 - Software image verification bypass in Cisco NX-OS
Published: December 4, 2024
Security Bulletin ID
SB2024120435
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2024-20397)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: 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
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.
Remediation
Install update from vendor's website.
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-image-sig-bypas-pQDRQvjL
- https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwh76163
- https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwh76166
- https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwj35846
- https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwm47438
- https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwn11901