What is CVE-2023-20064?

CVE-2023-20064 is a medium-severity vulnerability in Cisco Asr 9000v-V2, classified under Missing Authorization. CVSS score: 4.6/10. Published 2023-03-09.

How severe is CVE-2023-20064?

Medium severity. CVSS v3 base score is 4.6 out of 10.

Auth bypass in Cisco Asr 9000v-V2

CVE-2023-20064

A vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software could allow an unauthenticated attacker with physical access to the device to view sensitive files on the console using the GRUB bootloader command line. This vulnerability is due to the inclusion of unnecessary commands within the GRUB environment that allow sensitive files to be viewed. An attacker could exploit this vulnerability by being connected to the console port of the Cisco IOS XR device when the device is power-cycled. A successful exploit could allow the attacker to view sensitive files that could be used to conduct additional attacks against the device.

Vulnerability class: Broken Access Control

EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

psirt@cisco.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-20064?: CVE-2023-20064 is a medium-severity vulnerability in Cisco Asr 9000v-V2, classified under Missing Authorization. CVSS score: 4.6/10. Published 2023-03-09.
How severe is CVE-2023-20064?: Medium severity. CVSS v3 base score is 4.6 out of 10.