CVE-2023-20064 : A vulnerability in the GRand Unified Bootloader (GRUB) for Cisco IOS XR Software

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.

Published 2023-03-09 22:15:52

Updated 2023-03-16 14:36:55

Source Cisco Systems, Inc.

View at NVD, CVE.org

Products affected by CVE-2023-20064

Cisco » Ios Xr
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 6000 » Version: N/A
Cisco » Ios Xr
Versions before (<) 7.9.1
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Asr 9000v-v2 » Version: N/A For X64
When used together with: Cisco » Asr 9001 » Version: N/A For X64
When used together with: Cisco » Asr 9006 » Version: N/A For X64
When used together with: Cisco » Asr 9010 » Version: N/A For X64
When used together with: Cisco » Asr 9901 » Version: N/A For X64
When used together with: Cisco » Asr 9902 » Version: N/A For X64
When used together with: Cisco » Asr 9903 » Version: N/A For X64
When used together with: Cisco » Asr 9904 » Version: N/A For X64
When used together with: Cisco » Asr 9906 » Version: N/A For X64
When used together with: Cisco » Asr 9910 » Version: N/A For X64
When used together with: Cisco » Asr 9912 » Version: N/A For X64
When used together with: Cisco » Asr 9922 » Version: N/A For X64
When used together with: Cisco » Ios Xrv 9000 » Version: N/A
When used together with: Cisco » Ncs 1001 » Version: N/A
When used together with: Cisco » Ncs 1002 » Version: N/A
When used together with: Cisco » Ncs 1004 » Version: N/A
Cisco » Ios Xr
Versions before (<) 7.6.1
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Nc57-18dd-se » Version: N/A
When used together with: Cisco » Nc57-24dd » Version: N/A
When used together with: Cisco » Nc57-36h-se » Version: N/A
When used together with: Cisco » Nc57-36h6d-s » Version: N/A
When used together with: Cisco » Ncs 540 » Version: N/A
When used together with: Cisco » Ncs 540 Fronthaul » Version: N/A
When used together with: Cisco » Ncs 5501 » Version: N/A
When used together with: Cisco » Ncs 5501-se » Version: N/A
When used together with: Cisco » Ncs 5502 » Version: N/A
When used together with: Cisco » Ncs 5502-se » Version: N/A
When used together with: Cisco » Ncs 5508 » Version: N/A
When used together with: Cisco » Ncs 5516 » Version: N/A
When used together with: Cisco » Ncs 560-4 » Version: N/A
When used together with: Cisco » Ncs 560-7 » Version: N/A
When used together with: Cisco » Ncs 57b1-5dse-sys » Version: N/A
When used together with: Cisco » Ncs 57b1-6d24-sys » Version: N/A
When used together with: Cisco » Ncs 57c1-48q6-sys » Version: N/A
When used together with: Cisco » Ncs 57c3-mod-sys » Version: N/A
When used together with: Cisco » Ncs 57c3-mods-sys » Version: N/A
Cisco » Ios Xr
Versions before (<) 7.7.1
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Ncs 5001 » Version: N/A
When used together with: Cisco » Ncs 5002 » Version: N/A
When used together with: Cisco » Ncs 5011 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2023-20064

EPSS FAQ

0.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 27 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-20064

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source	First Seen
4.6	MEDIUM	CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	0.9	3.6	Cisco Systems, Inc.
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
4.6	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	N/A	N/A	Cisco:cisco-sa-iosxr-load-infodisc-9rdOr5Fq	2024-11-13
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
4.6	MEDIUM	CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	0.9	3.6	NIST
Attack Vector: Physical Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2023-20064

CWE-862 Missing Authorization

The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
Assigned by:
- nvd@nist.gov (Primary)
- ykramarz@cisco.com (Secondary)

References for CVE-2023-20064

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-load-infodisc-9rdOr5Fq

Cisco IOS XR Software Bootloader Unauthenticated Information Disclosure Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2023-20064

Products affected by CVE-2023-20064

Exploit prediction scoring system (EPSS) score for CVE-2023-20064

CVSS scores for CVE-2023-20064

CWE ids for CVE-2023-20064

References for CVE-2023-20064