NVD

CVE-2021-1398 Detail

Modified

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device. This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

CNA: Cisco Systems, Inc.

Base Score: 6.8 MEDIUM

Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 6.9 MEDIUM

Vector: (AV:L/AC:M/Au:N/C:C/I:C/A:C)

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-ACE-75K3bRWe	CVE, Cisco Systems, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-489	Active Debug Code	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Initial Analysis by NIST 3/29/2021 5:45:18 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CVSS V2		NIST (AV:L/AC:M/Au:N/C:C/I:C/A:C)
Added	CPE Configuration		Record truncated, showing 2048 of 13155 characters. View Entire Change Record OR cpe:2.3:o:cisco:ios_xe:3.7.0bs::::::: cpe:2.3:o:cisco:ios_xe:3.7.0s::::::: cpe:2.3:o:cisco:ios_xe:3.7.0xas::::::: cpe:2.3:o:cisco:ios_xe:3.7.0xbs::::::: cpe:2.3:o:cisco:ios_xe:3.7.1as::::::: cpe:2.3:o:cisco:ios_xe:3.7.1s::::::: cpe:2.3:o:cisco:ios_xe:3.7.2s::::::: cpe:2.3:o:cisco:ios_xe:3.7.2ts::::::: cpe:2.3:o:cisco:ios_xe:3.7.3s::::::: cpe:2.3:o:cisco:ios_xe:3.7.4as::::::: cpe:2.3:o:cisco:ios_xe:3.7.4s::::::: cpe:2.3:o:cisco:ios_xe:3.7.5s::::::: cpe:2.3:o:cisco:ios_xe:3.7.6s::::::: cpe:2.3:o:cisco:ios_xe:3.7.7s::::::: cpe:2.3:o:cisco:ios_xe:3.7.8s::::::: cpe:2.3:o:cisco:ios_xe:3.8.0s::::::: cpe:2.3:o:cisco:ios_xe:3.8.1s::::::: cpe:2.3:o:cisco:ios_xe:3.8.2s::::::: cpe:2.3:o:cisco:ios_xe:3.9.0as::::::: cpe:2.3:o:cisco:ios_xe:3.9.0s::::::: cpe:2.3:o:cisco:ios_xe:3.9.0xas::::::: cpe:2.3:o:cisco:ios_xe:3.9.1as::::::: cpe:2.3:o:cisco:ios_xe:3.9.1s::::::: cpe:2.3:o:cisco:ios_xe:3.9.2s::::::: cpe:2.3:o:cisco:ios_xe:3.10.0s::::::: cpe:2.3:o:cisco:ios_xe:3.10.1s::::::: cpe:2.3:o:cisco:ios_xe:3.10.1xbs::::::: cpe:2.3:o:cisco:ios_xe:3.10.1xcs::::::: cpe:2.3:o:cisco:ios_xe:3.10.2as::::::: cpe:2.3:o:cisco:ios_xe:3.10.2s::::::: cpe:2.3:o:cisco:ios_xe:3.10.2ts::::::: cpe:2.3:o:cisco:ios_xe:3.10.3s::::::: cpe:2.3:o:cisco:ios_xe:3.10.4s::::::: cpe:2.3:o:cisco:ios_xe:3.10.5s::::::: cpe:2.3:o:cisco:ios_xe:3.10.6s::::::: cpe:2.3:o:cisco:ios_xe:3.10.7s::::::: cpe:2.3:o:cisco:ios_xe:3.10.8as::::::: cpe:2.3:o:cisco:ios_xe:3.10.8s::::::: cpe:2.3:o:cisco:ios_xe:3.10.9s::::::: cpe:2.3:o:cisco:ios_xe:3.10.10s::::::: *cpe
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-ACE-75K3bRWe No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-ACE-75K3bRWe Vendor Advisory

CVE Modified by Cisco Systems, Inc. 3/24/2021 5:15:13 PM

Action

Type

Old Value

New Value

Changed

Description

 A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device.
 This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

A vulnerability in the boot logic of Cisco IOS XE Software could allow an authenticated, local attacker with level 15 privileges or an unauthenticated attacker with physical access to execute arbitrary code on the underlying Linux operating system of an affected device. This vulnerability is due to incorrect validations of specific function arguments that are passed to the boot script. An attacker could exploit this vulnerability by tampering with a specific file, which an affected device would process during the initial boot process. On systems that are protected by the Unified Extensible Firmware Interface (UEFI) secure boot feature, a successful exploit could allow the attacker to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

Quick Info

CVE Dictionary Entry:
CVE-2021-1398
NVD Published Date:
03/24/2021
NVD Last Modified:
11/21/2024
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-1398 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

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Change History

CVE Modified by CVE 11/21/2024 12:44:15 AM

CVE Modified by Cisco Systems, Inc. 5/14/2024 3:58:49 AM

CVE Modified by Cisco Systems, Inc. 11/06/2023 10:28:12 PM

Initial Analysis by NIST 3/29/2021 5:45:18 PM

CVE Modified by Cisco Systems, Inc. 3/24/2021 5:15:13 PM

Quick Info