CVE-2024-20397

Cisco NX-OS Software Image Verification Bypass Vulnerability

Published Dec 4, 2024 CVSS 3.1 · 5.2 Medium EPSS < 1% KEV · Not listed

Description

A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification. 

This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Cisco

Cisco NX-OS Software

unknown

Version	Status	Constraints
`8.2(5)`	affected	—
`7.3(5)D1(1)`	affected	—
`8.4(2)`	affected	—
`8.4(3)`	affected	—
`9.2(3)`	affected	—
`7.0(3)I5(2)`	affected	—
`8.2(1)`	affected	—
`6.0(2)A8(7a)`	affected	—
`7.0(3)I4(5)`	affected	—
`7.3(1)D1(1)`	affected	—
`7.0(3)I4(6)`	affected	—
`7.0(3)I4(3)`	affected	—
`9.2(2v)`	affected	—
`7.3(0)D1(1)`	affected	—
`7.0(3)I4(7)`	affected	—
`7.0(3)I4(1)`	affected	—
`7.0(3)I4(8)`	affected	—
`7.0(3)I4(2)`	affected	—
`6.0(2)A8(11)`	affected	—
`7.3(4)D1(1)`	affected	—
`9.2(1)`	affected	—
`9.2(2t)`	affected	—
`9.2(3y)`	affected	—
`7.0(3)I4(1t)`	affected	—
`7.0(3)I7(6z)`	affected	—
`9.3(2)`	affected	—
`7.3(1)DY(1)`	affected	—
`7.0(3)F3(3)`	affected	—
`7.0(3)I7(3z)`	affected	—
`7.0(3)IM7(2)`	affected	—
`6.0(2)A8(11b)`	affected	—
`7.0(3)I7(5a)`	affected	—
`8.1(1)`	affected	—
`7.0(3)I6(1)`	affected	—
`8.2(2)`	affected	—
`7.0(3)I5(3b)`	affected	—
`8.3(2)`	affected	—
`7.3(2)D1(3a)`	affected	—
`9.2(4)`	affected	—
`6.0(2)A8(10)`	affected	—
`6.0(2)A8(2)`	affected	—
`7.0(3)IC4(4)`	affected	—
`8.1(2)`	affected	—
`7.0(3)F3(3c)`	affected	—
`7.3(3)D1(1)`	affected	—
`7.0(3)F3(1)`	affected	—
`7.0(3)F3(5)`	affected	—
`8.2(3)`	affected	—
`7.0(3)I7(2)`	affected	—
`7.0(3)I5(3)`	affected	—
`7.0(3)I7(3)`	affected	—
`6.0(2)A8(6)`	affected	—
`7.0(3)I6(2)`	affected	—
`8.3(1)`	affected	—
`8.4(1)`	affected	—
`8.1(1b)`	affected	—
`6.0(2)A8(5)`	affected	—
`7.3(0)DX(1)`	affected	—
`7.3(2)D1(1)`	affected	—
`9.3(1)`	affected	—
`6.0(2)A8(7)`	affected	—
`7.0(3)I7(6)`	affected	—
`7.3(2)D1(2)`	affected	—
`6.0(2)A8(11a)`	affected	—
`7.0(3)I4(8z)`	affected	—
`7.0(3)I4(9)`	affected	—
`8.2(4)`	affected	—
`7.0(3)I7(4)`	affected	—
`7.0(3)I7(7)`	affected	—
`7.3(0)DY(1)`	affected	—
`6.0(2)A8(9)`	affected	—
`6.0(2)A8(1)`	affected	—
`6.0(2)A8(10a)`	affected	—
`7.0(3)I5(1)`	affected	—
`9.3(1z)`	affected	—
`9.2(2)`	affected	—
`7.0(3)F3(4)`	affected	—
`7.0(3)I4(8b)`	affected	—
`8.1(2a)`	affected	—
`7.3(2)D1(3)`	affected	—
`6.0(2)A8(3)`	affected	—
`7.0(3)I4(6t)`	affected	—
`7.0(3)I5(3a)`	affected	—
`8.1(1a)`	affected	—
`6.0(2)A8(8)`	affected	—
`7.0(3)I7(5)`	affected	—
`7.0(3)F3(3a)`	affected	—
`6.0(2)A8(4)`	affected	—
`7.0(3)I4(8a)`	affected	—
`7.0(3)F3(2)`	affected	—
`7.0(3)I4(4)`	affected	—
`7.0(3)I7(1)`	affected	—
`7.0(3)IA7(2)`	affected	—
`7.0(3)IA7(1)`	affected	—
`6.0(2)A8(7b)`	affected	—
`6.0(2)A8(4a)`	affected	—
`8.4(1a)`	affected	—
`9.3(3)`	affected	—
`7.3(2)D1(1d)`	affected	—
`7.0(3)I7(8)`	affected	—
`9.3(4)`	affected	—
`7.3(6)D1(1)`	affected	—
`8.2(6)`	affected	—
`9.3(5)`	affected	—
`8.4(2a)`	affected	—
`8.4(2b)`	affected	—
`7.0(3)I7(9)`	affected	—
`8.5(1)`	affected	—
`9.3(6)`	affected	—
`10.1(2)`	affected	—
`10.1(1)`	affected	—
`8.4(4)`	affected	—
`7.3(7)D1(1)`	affected	—
`8.4(2c)`	affected	—
`9.3(5w)`	affected	—
`8.2(7)`	affected	—
`9.3(7)`	affected	—
`9.3(7k)`	affected	—
`7.0(3)I7(9w)`	affected	—
`10.2(1)`	affected	—
`7.3(8)D1(1)`	affected	—
`9.3(7a)`	affected	—
`8.2(7a)`	affected	—
`9.3(8)`	affected	—
`8.4(4a)`	affected	—
`8.4(2d)`	affected	—
`8.4(5)`	affected	—
`7.0(3)I7(10)`	affected	—
`8.2(8)`	affected	—
`10.2(1q)`	affected	—
`10.2(2)`	affected	—
`9.3(9)`	affected	—
`10.1(2t)`	affected	—
`7.3(9)D1(1)`	affected	—
`10.2(3)`	affected	—
`8.4(6)`	affected	—
`10.2(3t)`	affected	—
`8.4(2e)`	affected	—
`9.3(10)`	affected	—
`10.2(2a)`	affected	—
`9.2(1a)`	affected	—
`8.2(9)`	affected	—
`10.3(1)`	affected	—
`10.2(4)`	affected	—
`8.4(7)`	affected	—
`10.3(2)`	affected	—
`8.4(6a)`	affected	—
`9.3(11)`	affected	—
`10.3(3)`	affected	—
`10.2(5)`	affected	—
`9.4(1)`	affected	—
`9.3(2a)`	affected	—
`8.4(2f)`	affected	—
`8.2(10)`	affected	—
`9.3(12)`	affected	—
`10.2(3v)`	affected	—
`10.4(1)`	affected	—
`8.4(8)`	affected	—
`10.3(99w)`	affected	—
`10.2(6)`	affected	—
`10.3(3w)`	affected	—
`10.3(99x)`	affected	—
`10.3(3o)`	affected	—
`8.4(9)`	affected	—
`10.3(4)`	affected	—
`10.3(3p)`	affected	—
`10.3(4a)`	affected	—
`9.4(1a)`	affected	—
`10.4(2)`	affected	—
`10.3(3q)`	affected	—
`9.3(13)`	affected	—
`8.2(11)`	affected	—
`10.3(5)`	affected	—
`10.2(7)`	affected	—
`10.4(3)`	affected	—
`10.3(3x)`	affected	—
`10.3(4g)`	affected	—
`10.5(1)`	affected	—
`10.2(8)`	affected	—
`10.3(3r)`	affected	—
`10.3(6)`	affected	—
`9.3(14)`	affected	—
`10.4(4)`	affected	—
`10.3(4h)`	affected	—
`10.4(4g)`	affected	—

Cisco

Cisco NX-OS System Software in ACI Mode

unknown

Version	Status	Constraints
`14.1(1j)`	affected	—
`14.0(3d)`	affected	—
`14.1(1k)`	affected	—
`13.2(1m)`	affected	—
`14.0(3c)`	affected	—
`13.2(2l)`	affected	—
`13.2(7k)`	affected	—
`14.1(1l)`	affected	—
`14.2(2f)`	affected	—
`13.2(3s)`	affected	—
`13.2(2o)`	affected	—
`14.0(2c)`	affected	—
`14.1(2m)`	affected	—
`13.2(5e)`	affected	—
`14.1(2o)`	affected	—
`13.2(7f)`	affected	—
`13.2(41d)`	affected	—
`13.2(4d)`	affected	—
`13.2(3o)`	affected	—
`13.2(1l)`	affected	—
`14.0(1h)`	affected	—
`13.2(3n)`	affected	—
`14.2(1l)`	affected	—
`14.2(2e)`	affected	—
`13.2(4e)`	affected	—
`14.2(1i)`	affected	—
`13.2(9b)`	affected	—
`14.1(2s)`	affected	—
`14.1(1i)`	affected	—
`14.1(2g)`	affected	—
`13.2(3j)`	affected	—
`13.2(5d)`	affected	—
`13.2(6i)`	affected	—
`14.1(2u)`	affected	—
`13.2(3i)`	affected	—
`13.2(3r)`	affected	—
`13.2(5f)`	affected	—
`14.2(1j)`	affected	—
`14.1(2w)`	affected	—
`14.2(3n)`	affected	—
`14.2(3l)`	affected	—
`14.2(3j)`	affected	—
`14.2(2g)`	affected	—
`13.2(8d)`	affected	—
`14.1(2x)`	affected	—
`13.2(9f)`	affected	—
`14.2(3q)`	affected	—
`14.2(4i)`	affected	—
`13.2(9h)`	affected	—
`15.0(1k)`	affected	—
`14.2(4k)`	affected	—
`15.0(1l)`	affected	—
`15.0(2e)`	affected	—
`14.2(4o)`	affected	—
`14.2(4p)`	affected	—
`15.0(2h)`	affected	—
`14.2(5k)`	affected	—
`14.2(5l)`	affected	—
`14.2(5n)`	affected	—
`15.1(1h)`	affected	—
`14.2(6d)`	affected	—
`15.1(2e)`	affected	—
`14.2(6g)`	affected	—
`14.2(6h)`	affected	—
`15.1(3e)`	affected	—
`13.2(10e)`	affected	—
`14.2(6l)`	affected	—
`14.2(7f)`	affected	—
`15.1(4c)`	affected	—
`14.2(6o)`	affected	—
`15.2(1g)`	affected	—
`15.2(2e)`	affected	—
`14.2(7l)`	affected	—
`13.2(10f)`	affected	—
`15.2(2f)`	affected	—
`15.2(2g)`	affected	—
`14.2(7q)`	affected	—
`15.2(2h)`	affected	—
`15.2(3f)`	affected	—
`15.2(3e)`	affected	—
`15.2(3g)`	affected	—
`14.2(7r)`	affected	—
`14.2(7s)`	affected	—
`15.2(4d)`	affected	—
`15.2(4e)`	affected	—
`14.2(7t)`	affected	—
`15.2(5c)`	affected	—
`15.2(5d)`	affected	—
`13.2(10g)`	affected	—
`16.0(1g)`	affected	—
`14.2(7u)`	affected	—
`15.2(5e)`	affected	—
`15.2(4f)`	affected	—
`15.2(6e)`	affected	—
`15.2(6h)`	affected	—
`16.0(1j)`	affected	—
`15.2(6g)`	affected	—
`15.2(7f)`	affected	—
`14.2(7v)`	affected	—
`15.2(7g)`	affected	—
`16.0(2h)`	affected	—
`14.2(7w)`	affected	—
`15.2(8d)`	affected	—
`16.0(2j)`	affected	—
`15.2(8e)`	affected	—
`16.0(3d)`	affected	—
`16.0(3e)`	affected	—
`15.2(8f)`	affected	—
`15.2(8g)`	affected	—
`15.3(1d)`	affected	—
`15.2(8h)`	affected	—
`16.0(4c)`	affected	—
`15.3(2a)`	affected	—
`15.2(8i)`	affected	—
`16.0(5h)`	affected	—
`15.3(2b)`	affected	—
`16.0(3g)`	affected	—
`16.0(5j)`	affected	—
`15.3(2c)`	affected	—
`16.0(6c)`	affected	—
`15.3(2d)`	affected	—
`16.1(1f)`	affected	—
`16.0(7e)`	affected	—
`16.0(8e)`	affected	—
`15.3(2e)`	affected	—

Cisco

Cisco Unified Computing System (Managed)

unknown

Version	Status	Constraints
`4.0(4c)`	affected	—
`4.0(2b)`	affected	—
`4.1(2a)`	affected	—
`4.0(1a)`	affected	—
`4.0(2a)`	affected	—
`4.0(1b)`	affected	—
`4.1(1c)`	affected	—
`4.0(4a)`	affected	—
`4.0(4b)`	affected	—
`4.0(2e)`	affected	—
`4.1(1a)`	affected	—
`4.0(4d)`	affected	—
`4.0(4h)`	affected	—
`4.0(4g)`	affected	—
`4.0(1d)`	affected	—
`4.1(1e)`	affected	—
`4.0(4f)`	affected	—
`4.0(4e)`	affected	—
`4.0(4i)`	affected	—
`4.1(1d)`	affected	—
`4.0(2d)`	affected	—
`4.1(1b)`	affected	—
`4.0(1c)`	affected	—
`4.1(2b)`	affected	—
`4.0(4k)`	affected	—
`4.1(3a)`	affected	—
`4.1(3b)`	affected	—
`4.1(2c)`	affected	—
`4.0(4l)`	affected	—
`4.1(4a)`	affected	—
`4.1(3c)`	affected	—
`4.1(3d)`	affected	—
`4.2(1c)`	affected	—
`4.2(1d)`	affected	—
`4.0(4m)`	affected	—
`4.1(3e)`	affected	—
`4.2(1f)`	affected	—
`4.1(3f)`	affected	—
`4.2(1i)`	affected	—
`4.1(3h)`	affected	—
`4.2(1k)`	affected	—
`4.2(1l)`	affected	—
`4.0(4n)`	affected	—
`4.2(1m)`	affected	—
`4.1(3i)`	affected	—
`4.2(2a)`	affected	—
`4.2(1n)`	affected	—
`4.1(3j)`	affected	—
`4.2(2c)`	affected	—
`4.2(2d)`	affected	—
`4.2(3b)`	affected	—
`4.1(3k)`	affected	—
`4.0(4o)`	affected	—
`4.2(2e)`	affected	—
`4.2(3d)`	affected	—
`4.2(3e)`	affected	—
`4.2(3g)`	affected	—
`4.1(3l)`	affected	—
`4.3(2b)`	affected	—
`4.2(3h)`	affected	—
`4.2(3i)`	affected	—
`4.3(2c)`	affected	—
`4.1(3m)`	affected	—
`4.3(2e)`	affected	—
`4.3(3a)`	affected	—
`4.2(3j)`	affected	—
`4.3(3c)`	affected	—
`4.2(3k)`	affected	—
`4.2(3l)`	affected	—
`4.3(2f)`	affected	—
`4.2(3m)`	affected	—

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

Source	ID	Title
EUVD	EUVD-2024-18112	A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification.  This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.

Metrics

No CVSS v4.0

Attack Vector Physical

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.298% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-image-sig-bypas-pQDRQvjL

History

Feb 5, 2025 8:30 PM Description updated View changes

Type	Values Removed	Values Added
Description	A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification. This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.	A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification.  This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.

Dec 4, 2024 10:15 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Dec 4, 2024 4:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		A vulnerability in the bootloader of Cisco NX-OS Software could allow an unauthenticated attacker with physical access to an affected device, or an authenticated, local attacker with administrative credentials, to bypass NX-OS image signature verification. This vulnerability is due to insecure bootloader settings. An attacker could exploit this vulnerability by executing a series of bootloader commands. A successful exploit could allow the attacker to bypass NX-OS image signature verification and load unverified software.
Title		Cisco NX-OS Software Image Verification Bypass Vulnerability
Weaknesses		CWE-284
References		https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-image-sig-bypas-pQDRQvjL
Metrics		cvssV3_1 `{'score': 5.2, 'vector': 'CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N'}`