Severity: high (7.8)
First published: Wed Sep 13 2023
Last modified: Fri Sep 15 2023
CWE: 345
A vulnerability in the iPXE boot function of Cisco IOS XR software could allow an authenticated, local attacker to install an unverified software image on an affected device. This vulnerability is due to insufficient image verification. An attacker could exploit this vulnerability by manipulating the boot parameters for image verification during the iPXE boot process on an affected device. A successful exploit could allow the attacker to boot an unverified software image on the affected device.
CVE-2023-20236 is a vulnerability in the iPXE boot function of Cisco IOS XR software that could allow an authenticated, local attacker to install an unverified software image on an affected device.
CVE-2023-20236 has a severity score of 7.8, which is considered high.
Cisco IOS XR software up to version 7.10.1 is affected by CVE-2023-20236.
An attacker can exploit CVE-2023-20236 by manipulating the image verification process.
You can find more information about CVE-2023-20236 on the Cisco Security Advisory page: [link](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB)
