CVE-2022-20728
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.
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 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\(001\) | — |
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