SB2023091420 - Improper Verification of Cryptographic Signature in Cisco IOS XR Software
Published: September 14, 2023
Security Bulletin ID
SB2023091420
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Verification of Cryptographic Signature (CVE-ID: CVE-2023-20236)
CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to compromise the target system.
The vulnerability exists due to insufficient image verification in the iPXE boot function. A local administrator can boot an unverified software image on the target device.
Remediation
Install update from vendor's website.