SB2021033007 - Improper Verification of Cryptographic Signature in Cisco IOS XE Software for the Catalyst 9000 Family
Published: March 30, 2021
Security Bulletin ID
SB2021033007
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 security vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2021-1453)
The vulnerability allows a local attacker to compromise the target system.
The vulnerability exists due to an improper check in the code function that manages the verification of the digital signatures of system image files during the initial boot process. An attacker with physical access can boot a malicious software image or execute unsigned code and bypass the image verification check part of the secure boot process of an affected device.
Remediation
Install update from vendor's website.