QID 317355

Date Published: 2023-09-20

QID 317355: Cisco Internetwork Operating System (IOS) XR Software iPXE Boot Signature Bypass Vulnerability (cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB)

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.

Affected Products
Cisco IOS XR prior to 7.10.1

QID Detection Logic (Authenticated):
The check matches Cisco IOS XR version retrieved via Unix Auth using "show version" command.

A successful exploit could allow the attacker to boot an unverified software image on the affected device.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as Medium - 4.6 severity.
    • Solution

    Customers are advised to refer to cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB for more information.

    Vendor References

    CVEs related to QID 317355

    CVE-2023-20236 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB URL Logo sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-ipxe-sigbypass-pymfyqgB
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