NVD

CVE-2021-34720 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 IP Service Level Agreements (IP SLA) responder and Two-Way Active Measurement Protocol (TWAMP) features of Cisco IOS XR Software could allow an unauthenticated, remote attacker to cause device packet memory to become exhausted or cause the IP SLA process to crash, resulting in a denial of service (DoS) condition. This vulnerability exists because socket creation failures are mishandled during the IP SLA and TWAMP processes. An attacker could exploit this vulnerability by sending specific IP SLA or TWAMP packets to an affected device. A successful exploit could allow the attacker to exhaust the packet memory, which will impact other processes, such as routing protocols, or crash the IP SLA process.

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:

CNA: Cisco Systems, Inc.

Base Score: 8.6 HIGH

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

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 4.3 MEDIUM

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

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsla-ZA3SRrpP	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Other	NIST
CWE-771	Missing Reference to Active Allocated Resource	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

4 change records found show changes

Initial Analysis by NIST 9/22/2021 10:56:21 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		Record truncated, showing 500 of 802 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:8101-32fh:-:::::::* cpe:2.3:h:cisco:8101-32h:-:::::::* cpe:2.3:h:cisco:8102-64h:-:::::::* cpe:2.3:h:cisco:8201:
Added	CPE Configuration		Record truncated, showing 500 of 930 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:asr_9000v-v2:-:::::::* cpe:2.3:h:cisco:asr_9001:-:::::::* cpe:2.3:h:cisco:asr_9006:-:::::::* cpe:2.3:h:cisco:as
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ios_xrv:-:::::::* cpe:2.3:h:cisco:ios_xrv_9000:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_1001:-:::::::* cpe:2.3:h:cisco:ncs_1002:-:::::::* cpe:2.3:h:cisco:ncs_1004:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_4009:-:::::::* cpe:2.3:h:cisco:ncs_4016:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_5001:-:::::::* cpe:2.3:h:cisco:ncs_5002:-:::::::* cpe:2.3:h:cisco:ncs_5011:-:::::::*
Added	CPE Configuration		Record truncated, showing 500 of 578 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_520:-:::::::* cpe:2.3:h:cisco:ncs_540:-:::::::* cpe:2.3:h:cisco:ncs_540_fronthaul:-:::::::* cpe:2.3:h:cisco
Added	CPE Configuration		Record truncated, showing 500 of 626 characters. View Entire Change Record AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_5501:-:::::::* cpe:2.3:h:cisco:ncs_5501-se:-:::::::* cpe:2.3:h:cisco:ncs_5502:-:::::::* cpe:2.3:h:cisco:ncs
Added	CPE Configuration		AND OR cpe:2.3:o:cisco:ios_xr::::::::* versions up to (excluding) 6.2.3 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.3.0 up to (excluding) 6.3.2 cpe:2.3:o:cisco:ios_xr::::::::* versions from (including) 6.5.0 up to (excluding) 7.2.2 OR cpe:2.3:h:cisco:ncs_6000:-:::::::* cpe:2.3:h:cisco:ncs_6008:-:::::::*
Added	CVSS V2		NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added	CWE		NIST CWE-400
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsla-ZA3SRrpP No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipsla-ZA3SRrpP Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-34720
NVD Published Date:
09/09/2021
NVD Last Modified:
11/06/2023
Source:
Cisco Systems, Inc.

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