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6.8
CVSSv3

CVE-2021-1398

Published: 24/03/2021 Updated: 07/11/2023
CVSS v2 Base Score: 6.9 | Impact Score: 10 | Exploitability Score: 3.4
CVSS v3 Base Score: 6.8 | Impact Score: 5.9 | Exploitability Score: 0.9
VMScore: 614
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
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Vulnerability Summary

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 malicious user to execute unsigned code at boot time and bypass the image verification check in the secure boot process of the affected device.

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Vendor Advisories

Cisco: Cisco IOS XE Software Arbitrary Code Execution Vulnerability
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 argumen ...

References

CWE-489https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-ACE-75K3bRWehttps://nvd.nist.govhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-ACE-75K3bRWe
CVSSv3
CVSSv2
CVSSv3
VMScore
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