| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-49533: ath11k: Change max no of active probe SSID and BSSID to fw capability |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ath11k: Change max no of active probe SSID and BSSID to fw capability |
| |
| The maximum number of SSIDs in a for active probe requests is currently |
| reported as 16 (WLAN_SCAN_PARAMS_MAX_SSID) when registering the driver. |
| The scan_req_params structure only has the capacity to hold 10 SSIDs. |
| This leads to a buffer overflow which can be triggered from |
| wpa_supplicant in userspace. When copying the SSIDs into the |
| scan_req_params structure in the ath11k_mac_op_hw_scan route, it can |
| overwrite the extraie pointer. |
| |
| Firmware supports 16 ssid * 4 bssid, for each ssid 4 bssid combo probe |
| request will be sent, so totally 64 probe requests supported. So |
| set both max ssid and bssid to 16 and 4 respectively. Remove the |
| redundant macros of ssid and bssid. |
| |
| Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.7.0.1-01300-QCAHKSWPL_SILICONZ-1 |
| |
| The Linux kernel CVE team has assigned CVE-2022-49533 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 5.17.14 with commit 210505788f1d243232e21ef660efcd4838890ce8 |
| Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 5.18.3 with commit ec5dfa1d66f2f71a48dab027d26a9fa78eb0f58f |
| Issue introduced in 5.6 with commit d5c65159f2895379e11ca13f62feabe93278985d and fixed in 5.19 with commit 50dc9ce9f80554a88e33b73c30851acf2be36ed3 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-49533 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/net/wireless/ath/ath11k/wmi.h |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/210505788f1d243232e21ef660efcd4838890ce8 |
| https://git.kernel.org/stable/c/ec5dfa1d66f2f71a48dab027d26a9fa78eb0f58f |
| https://git.kernel.org/stable/c/50dc9ce9f80554a88e33b73c30851acf2be36ed3 |
