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CVE-2022-20728— Cisco Access Points VLAN Bypass from Native VLAN Vulnerability

Quick assessment

Affected
Cisco Cisco Aironet Access Point Software (IOS XE Controller)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Access Points是美国思科（Cisco）公司的一款网络接入点设备。 Cisco Access Points 存在安全漏洞，该漏洞源于攻击者绕过VLAN后可以绕过Catalyst Access Point过滤规则实现发送恶意数据。

CVSS 4.7 · Medium EPSS 0.27% · P17

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-20728

Vulnerability Information
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Vulnerability Title
Cisco Access Points VLAN Bypass from Native VLAN Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the client forwarding code of multiple Cisco Access Points (APs) could allow an unauthenticated, adjacent attacker to inject packets from the native VLAN to clients within nonnative VLANs on an affected device. This vulnerability is due to a logic error on the AP that forwards packets that are destined to a wireless client if they are received on the native VLAN. An attacker could exploit this vulnerability by obtaining access to the native VLAN and directing traffic directly to the client through their MAC/IP combination. A successful exploit could allow the attacker to bypass VLAN separation and potentially also bypass any Layer 3 protection mechanisms that are deployed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Access Points 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Access Points是美国思科（Cisco）公司的一款网络接入点设备。 Cisco Access Points 存在安全漏洞，该漏洞源于攻击者绕过VLAN后可以绕过Catalyst Access Point过滤规则实现发送恶意数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco Aironet Access Point Software (IOS XE Controller) n/a -

II. Public POCs for CVE-2022-20728

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III. Intelligence Information for CVE-2022-20728

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Vendor Advisories for CVE-2022-20728 (1)

Same Patch Batch · Cisco · 2022-09-30 · 16 CVEs total

CVE-2022-20919 8.6 HIGH Cisco IOS and IOS XE Software Common Industrial Protocol Request Denial of Service Vulnera
CVE-2022-20856 8.6 HIGH Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family CAPWAP Mobility Den
CVE-2022-20848 8.6 HIGH Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst 9100 Series Access Poi
CVE-2022-20847 8.6 HIGH Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family DHCP Processing Den
CVE-2022-20855 7.9 HIGH Cisco IOS XE Software for Embedded Wireless Controllers on Catalyst Access Points Privileg
CVE-2022-20818 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerabilities
CVE-2022-20775 7.8 HIGH Cisco SD-WAN Software Privilege Escalation Vulnerability
CVE-2022-20945 7.4 HIGH Cisco Catalyst 9100 Series Access Points Association Request Denial of Service Vulnerabili
CVE-2022-20769 7.4 HIGH Cisco Wireless LAN Controller AireOS Software FIPS Mode Denial of Service Vulnerability
CVE-2022-20930 6.7 MEDIUM Cisco SD-WAN Software Arbitrary File Corruption Vulnerability
CVE-2022-20810 6.5 MEDIUM Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family SNMP Information Di
CVE-2022-20662 6.1 MEDIUM Cisco Duo for macOS Authentication Bypass Vulnerability
CVE-2022-20851 5.5 MEDIUM Cisco IOS XE Software Web UI Command Injection Vulnerability
CVE-2022-20850 5.5 MEDIUM Cisco SD-WAN Arbitrary File Deletion Vulnerability
CVE-2022-20844 5.3 MEDIUM Cisco Software-Defined Application Visibility and Control on Cisco vManage Static Username

IV. Related Vulnerabilities

Same product: Cisco Aironet Access Point Software (IOS XE Controller)
Same vendor: Cisco
Same weakness: CWE-284

V. Comments for CVE-2022-20728

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