NVD

CVE-2020-3118 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Description

A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 8.8 HIGH

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Nist CVSS score does not match with CNA score

CNA: Cisco Systems, Inc.

Base Score: 8.8 HIGH

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 8.3 HIGH

Vector: (AV:A/AC:L/Au:N/C:C/I:C/A:C)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html	Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html	Third Party Advisory VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce	Vendor Advisory

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.

Vulnerability Name	Date Added	Due Date	Required Action
Cisco IOS XR Software Discovery Protocol Format String Vulnerability	11/03/2021	05/03/2022	Apply updates per vendor instructions.

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-787	Out-of-bounds Write	NIST
CWE-134	Use of Externally-Controlled Format String	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

6 change records found show changes

Reanalysis by NIST 12/23/2022 11:59:18 AM

Action

Type

Old Value

New Value

Changed

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:*

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:5.2.5:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:ncs_6000:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:ncs_6008:-:*:*:*:*:*:*:*

Changed

CPE Configuration

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:ncs_5001:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:ncs_5002:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:ncs_5011:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:xrv_9000:-:*:*:*:*:*:*:*

Record truncated, showing 500 of 785 characters.
View Entire Change Record

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:6.4.2:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:asr_9000:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9903:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*
          cpe:2.3

Changed

CPE Configuration

Record truncated, showing 500 of 1828 characters.
View Entire Change Record

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:6.5.2:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:*
          cpe:2.3

Record truncated, showing 500 of 1630 characters.
View Entire Change Record

AND
     OR
          *cpe:2.3:o:cisco:ios_xr:6.5.3:*:*:*:*:*:*:*
     OR
          cpe:2.3:h:cisco:asr_9000v:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9010:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9901:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9904:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9906:-:*:*:*:*:*:*:*
          cpe:2.3:h:cisco:asr_9910:-:*:*:*:*:*:*:*
          cpe:2.3

Initial Analysis by NIST 2/10/2020 11:26:04 AM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CVSS V2		NIST (AV:A/AC:L/Au:N/C:C/I:C/A:C)
Added	CWE		NIST CWE-134
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr:5.2.5::::::: OR cpe:2.3:h:cisco:ncs_6000:-:::::::*
Added	CPE Configuration		Record truncated, showing 500 of 1828 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios_xr:6.5.2::::::: OR cpe:2.3:h:cisco:asr_9000v:-:::::::* cpe:2.3:h:cisco:asr_9001:-:::::::* cpe:2.3:h:cisco:asr_9006:-:::::::* cpe:2.3:h:cisco:asr_9010:-:::::::* cpe:2.3:h:cisco:asr_9901:-:::::::* cpe:2.3:h:cisco:asr_9904:-:::::::* cpe:2.3:h:cisco:asr_9906:-:::::::* cpe:2.3:h:cisco:asr_9910:-:::::::* cpe:2.3
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr:6.5.3::::::: OR cpe:2.3:h:cisco:ncs_5001:-:::::::* cpe:2.3:h:cisco:ncs_5002:-:::::::* cpe:2.3:h:cisco:ncs_5011:-:::::::* cpe:2.3:h:cisco:ncs_540:-:::::::* cpe:2.3:h:cisco:xrv_9000:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr:6.6.25::::::: OR cpe:2.3:h:cisco:ncs_560:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr:7.0.1::::::: OR cpe:2.3:h:cisco:ncs_540l:-:::::::*
Added	CPE Configuration		OR cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.6.0 up to (excluding) 6.6.12 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 7.0.0 up to (excluding) 7.0.2
Changed	Reference Type	http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html No Types Assigned	http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html Third Party Advisory, VDB Entry
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2020-3118
NVD Published Date:
02/05/2020
NVD Last Modified:
11/21/2024
Source:
Cisco Systems, Inc.

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2020-3118 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

This CVE is in CISA's Known Exploited Vulnerabilities Catalog

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CVE 11/21/2024 12:30:21 AM

CVE Modified by Cisco Systems, Inc. 5/14/2024 3:08:55 AM

Reanalysis by NIST 12/23/2022 11:59:18 AM

Reanalysis by NIST 9/20/2022 12:59:11 PM

Initial Analysis by NIST 2/10/2020 11:26:04 AM

CVE Modified by Cisco Systems, Inc. 2/05/2020 2:15:11 PM

Quick Info