Improper Verification of Cryptographic Signature in Cisco Systems, Inc products - CVE-2023-20082

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Main Vulnerability Database Vulnerabilities #VU73984

Improper Verification of Cryptographic Signature in Cisco Systems, Inc products - CVE-2023-20082

Published: March 23, 2023


Vulnerability identifier: #VU73984
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-20082
CWE-ID: CWE-347
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
Catalyst 9300 Series Switches
Cisco IOS XE
Cisco IOS XE ROM Monitor
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a local attacker to execute arbitrary code at boot time and break the chain of trust.

The vulnerability exists due to errors that occur when retrieving the public release key that is used for image signature verification. An attacker with physical access can modify specific variables in the Serial Peripheral Interface (SPI) flash memory and execute arbitrary code on the target system.


Remediation

Install updates from vendor's website.

External links