CVE-2021-1273 : Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated

Multiple vulnerabilities in Cisco SD-WAN products could allow an unauthenticated, remote attacker to execute denial of service (DoS) attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.

Published 2021-01-20 20:15:16

Updated 2023-10-06 16:24:49

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: OverflowDenial of service

Products affected by CVE-2021-1273

Cisco » Sd-wan Firmware » Version: 18.3.8
cpe:2.3:o:cisco:sd-wan_firmware:18.3.8:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 19.2.99
cpe:2.3:o:cisco:sd-wan_firmware:19.2.99:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 20.1.0
cpe:2.3:o:cisco:sd-wan_firmware:20.1.0:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 18.4.4
cpe:2.3:o:cisco:sd-wan_firmware:18.4.4:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 19.2.1
cpe:2.3:o:cisco:sd-wan_firmware:19.2.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 18.3.5
cpe:2.3:o:cisco:sd-wan_firmware:18.3.5:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 18.4.5
cpe:2.3:o:cisco:sd-wan_firmware:18.4.5:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 19.2.0
cpe:2.3:o:cisco:sd-wan_firmware:19.2.0:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 19.2.2
cpe:2.3:o:cisco:sd-wan_firmware:19.2.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Firmware » Version: 18.4.1
cpe:2.3:o:cisco:sd-wan_firmware:18.4.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Vsmart Controller Firmware
cpe:2.3:o:cisco:sd-wan_vsmart_controller_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Sd-wan Vbond Orchestrator » Version: N/A
cpe:2.3:a:cisco:sd-wan_vbond_orchestrator:-:*:*:*:*:*:*:*
Matching versions
Cisco » Ios Xe Sd-wan » Version: N/A
cpe:2.3:o:cisco:ios_xe_sd-wan:-:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Vedge 100 Router » Version: N/A
When used together with: Cisco » Vedge 1000 Router » Version: N/A
When used together with: Cisco » Vedge 100b Router » Version: N/A
When used together with: Cisco » Vedge 100m Router » Version: N/A
When used together with: Cisco » Vedge 100wm Router » Version: N/A
When used together with: Cisco » Vedge 2000 Router » Version: N/A
When used together with: Cisco » Vedge 5000 Router » Version: N/A
When used together with: Cisco » Vedge Cloud Router » Version: N/A
Cisco » Catalyst Sd-wan Manager » Version: N/A
cpe:2.3:a:cisco:catalyst_sd-wan_manager:-:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-1273

EPSS FAQ

0.76%

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

~ 71 %

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

CVSS scores for CVE-2021-1273

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:N/I:N/A:C	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Complete
8.6	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High
8.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H	3.9	4.0	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2021-1273

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Assigned by: ykramarz@cisco.com (Primary)

References for CVE-2021-1273

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-dosmulti-48jJuEUP

Cisco SD-WAN Denial of Service Vulnerabilities
Vendor Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-1273

Products affected by CVE-2021-1273

Exploit prediction scoring system (EPSS) score for CVE-2021-1273

CVSS scores for CVE-2021-1273

CWE ids for CVE-2021-1273

References for CVE-2021-1273