CVE-2023-20064
First published: Thu Mar 09 2023(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco IOS XR | <7.9.1 | |
| Cisco Asr 9000v-v2 | ||
| Cisco Asr 9001 | ||
| Cisco Asr 9006 | ||
| Cisco Asr 9010 | ||
| Cisco Asr 9901 | ||
| Cisco Asr 9902 | ||
| Cisco Asr 9903 | ||
| Cisco Asr 9904 | ||
| Cisco Asr 9906 | ||
| Cisco Asr 9910 | ||
| Cisco Asr 9912 | ||
| Cisco Asr 9922 | ||
| Cisco Ios Xrv 9000 | ||
| Cisco Ncs 1001 | ||
| Cisco Ncs 1002 | ||
| Cisco Ncs 1004 | ||
| Cisco IOS XR | <7.6.1 | |
| Cisco Nc57-18dd-se | ||
| Cisco Nc57-24dd | ||
| Cisco Nc57-36h-se | ||
| Cisco Nc57-36h6d-s | ||
| Cisco Ncs 540 | ||
| Cisco Ncs 540 Fronthaul | ||
| Cisco Ncs 5501 | ||
| Cisco Ncs 5501-se | ||
| Cisco Ncs 5502 | ||
| Cisco Ncs 5502-se | ||
| Cisco Ncs 5508 | ||
| Cisco Ncs 5516 | ||
| Cisco Ncs 560-4 | ||
| Cisco Ncs 560-7 | ||
| Cisco Ncs 57b1-5dse-sys | ||
| Cisco Ncs 57b1-6d24-sys | ||
| Cisco Ncs 57c1-48q6-sys | ||
| Cisco Ncs 57c3-mod-sys | ||
| Cisco Ncs 57c3-mods-sys | ||
| Cisco IOS XR | <7.7.1 | |
| Cisco Ncs 5001 | ||
| Cisco Ncs 5002 | ||
| Cisco Ncs 5011 | ||
| Cisco IOS XR | ||
| Cisco Ncs 6000 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2023-20064?
CVE-2023-20064 is a vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software.
How does CVE-2023-20064 affect Cisco devices?
CVE-2023-20064 could allow an unauthenticated attacker with physical access to the device to view sensitive files on the console using the GRUB bootloader command line.
What is the severity of CVE-2023-20064?
CVE-2023-20064 has a severity rating of 4.6, classified as medium.
How can I fix CVE-2023-20064?
To fix CVE-2023-20064, it is recommended to update to a version of Cisco IOS XR Software that is not vulnerable.
Where can I find more information about CVE-2023-20064?
More information about CVE-2023-20064 can be found in the Cisco Security Advisory at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-load-infodisc-9rdOr5Fq.
- collector/nvd-index
- vendor/cisco
- canonical/cisco ios xr
- canonical/cisco asr 9000v-v2
- canonical/cisco asr 9001
- canonical/cisco asr 9006
- canonical/cisco asr 9010
- canonical/cisco asr 9901
- canonical/cisco asr 9902
- canonical/cisco asr 9903
- canonical/cisco asr 9904
- canonical/cisco asr 9906
- canonical/cisco asr 9910
- canonical/cisco asr 9912
- canonical/cisco asr 9922
- canonical/cisco ios xrv 9000
- canonical/cisco ncs 1001
- canonical/cisco ncs 1002
- canonical/cisco ncs 1004
- canonical/cisco nc57-18dd-se
- canonical/cisco nc57-24dd
- canonical/cisco nc57-36h-se
- canonical/cisco nc57-36h6d-s
- canonical/cisco ncs 540
- canonical/cisco ncs 540 fronthaul
- canonical/cisco ncs 5501
- canonical/cisco ncs 5501-se
- canonical/cisco ncs 5502
- canonical/cisco ncs 5502-se
- canonical/cisco ncs 5508
- canonical/cisco ncs 5516
- canonical/cisco ncs 560-4
- canonical/cisco ncs 560-7
- canonical/cisco ncs 57b1-5dse-sys
- canonical/cisco ncs 57b1-6d24-sys
- canonical/cisco ncs 57c1-48q6-sys
- canonical/cisco ncs 57c3-mod-sys
- canonical/cisco ncs 57c3-mods-sys
- canonical/cisco ncs 5001
- canonical/cisco ncs 5002
- canonical/cisco ncs 5011
- canonical/cisco ncs 6000