CVE-2023-20202 : A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE So

A vulnerability in the Wireless Network Control daemon (wncd) of Cisco IOS XE Software for Wireless LAN Controllers could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper memory management. An attacker could exploit this vulnerability by sending a series of network requests to an affected device. A successful exploit could allow the attacker to cause the wncd process to consume available memory and eventually cause the device to reload, resulting in a DoS condition.

Published 2023-09-27 18:15:11

Updated 2024-01-25 17:15:35

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2023-20202

Cisco » Ios Xe » Version: 17.9.1
cpe:2.3:o:cisco:ios_xe:17.9.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.1a
cpe:2.3:o:cisco:ios_xe:17.9.1a:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.1w
cpe:2.3:o:cisco:ios_xe:17.9.1w:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.10.1
cpe:2.3:o:cisco:ios_xe:17.10.1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.2
cpe:2.3:o:cisco:ios_xe:17.9.2:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.1x
cpe:2.3:o:cisco:ios_xe:17.9.1x:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.1x1
cpe:2.3:o:cisco:ios_xe:17.9.1x1:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.1y
cpe:2.3:o:cisco:ios_xe:17.9.1y:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.2a
cpe:2.3:o:cisco:ios_xe:17.9.2a:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.9.2b
cpe:2.3:o:cisco:ios_xe:17.9.2b:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.10.1a
cpe:2.3:o:cisco:ios_xe:17.10.1a:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A
Cisco » Ios Xe » Version: 17.10.1b
cpe:2.3:o:cisco:ios_xe:17.10.1b:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Catalyst 9105i » Version: N/A
When used together with: Cisco » Catalyst 9105w » Version: N/A
When used together with: Cisco » Catalyst 9115 » Version: N/A
When used together with: Cisco » Catalyst 9120 » Version: N/A
When used together with: Cisco » Catalyst 9124d » Version: N/A
When used together with: Cisco » Catalyst 9124e » Version: N/A
When used together with: Cisco » Catalyst 9124i » Version: N/A
When used together with: Cisco » Catalyst 9130 » Version: N/A
When used together with: Cisco » Catalyst 9136 » Version: N/A
When used together with: Cisco » Catalyst 9162 » Version: N/A
When used together with: Cisco » Catalyst 9164 » Version: N/A
When used together with: Cisco » Catalyst 9166 » Version: N/A
When used together with: Cisco » Catalyst 9166d1 » Version: N/A
When used together with: Cisco » Catalyst 9800-40 » Version: N/A
When used together with: Cisco » Catalyst 9800-80 » Version: N/A
When used together with: Cisco » Catalyst 9800-cl » Version: N/A
When used together with: Cisco » Catalyst 9800-l » Version: N/A
When used together with: Cisco » Catalyst Iw6300 » Version: N/A
When used together with: Cisco » Esw6300 » Version: N/A
When used together with: Cisco » Iw9167eh-x-ap » Version: N/A
When used together with: Cisco » Iw9167eh-x-urwb » Version: N/A
When used together with: Cisco » Iw9167eh-x-wgb » Version: N/A
When used together with: Cisco » Iw9167ih-x-ap » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2023-20202

EPSS FAQ

0.04%

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

~ 11 %

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

CVSS scores for CVE-2023-20202

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	2.8	3.6	NIST
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High
6.1	MEDIUM	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H	1.6	4.0	Cisco Systems, Inc.
Attack Vector: Adjacent Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Changed Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2023-20202

CWE-789 Memory Allocation with Excessive Size Value

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2023-20202

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-wncd-HFGMsfSD

Cisco IOS XE Software for Wireless LAN Controllers Wireless Network Control Denial of Service Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2023-20202

Products affected by CVE-2023-20202

Exploit prediction scoring system (EPSS) score for CVE-2023-20202

CVSS scores for CVE-2023-20202

CWE ids for CVE-2023-20202

References for CVE-2023-20202