CVE-2022-20728

30.09.2022, 19:15

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	4.7 MEDIUM	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
cisco	CNA	4.7 MEDIUM	ADJACENT_NETWORK	LOW	NONE	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Vendor	Product	Version
cisco	aironet_1542d_firmware	017.006\(001\)
cisco	aironet_1542i_firmware	017.006\(001\)
cisco	aironet_1562i_firmware	017.006\(001\)
cisco	aironet_1562e_firmware	017.006\(001\)
cisco	aironet_1562d_firmware	017.006\(001\)
cisco	aironet_1815i_firmware	017.006\(001\)
cisco	aironet_1815m_firmware	017.006\(001\)
cisco	aironet_1815t_firmware	017.006\(001\)
cisco	aironet_1815w_firmware	017.006\(001\)
cisco	aironet_1830_firmware	017.006\(001\)
cisco	aironet_1840_firmware	017.006\(001\)
cisco	aironet_1850e_firmware	017.006\(001\)
cisco	aironet_1850i_firmware	017.006\(001\)
cisco	aironet_2800i_firmware	017.006\(001\)
cisco	aironet_2800e_firmware	017.006\(001\)
cisco	aironet_3800i_firmware	017.006\(001\)
cisco	aironet_3800e_firmware	017.006\(001\)
cisco	aironet_3800p_firmware	017.006\(001\)
cisco	aironet_4800_firmware	017.006\(001\)
cisco	catalyst_9105ax_firmware	017.006\(001\)
cisco	catalyst_9115ax_firmware	017.006\(001\)
cisco	catalyst_9117ax_firmware	017.006\(001\)
cisco	catalyst_9120ax_firmware	017.006\(001\)
cisco	catalyst_9124ax_firmware	017.006\(001\)
cisco	catalyst_9130ax_firmware	017.006\(001\)
cisco	catalyst_iw6300_firmware	017.006\(001\)

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-284 - Improper Access Control
The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apvlan-TDTtb4FY