Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB read in WMM_param_handler() WMM_param_handler() copies a fixed-size WMM parameter element out of a received information element without checking that the element is long enough, causing an out-of-bounds read for a short WMM IE. The handler reads sizeof(struct WMM_para_element) (18) bytes at pIE->data + 6, so it requires pIE->length to be at least 24 (WLAN_WMM_LEN), but it never validates the length. Two of its three callers reach it after matching only the WMM OUI: OnAssocRsp() in rtw_mlme_ext.c matches a 6-byte OUI, and join_cmd_hdl() matches a 4-byte OUI, before calling the handler. A vendor-specific IE carrying the WMM OUI but a length between 6 and 23, placed in an association response or in the IE blob handed to join_cmd_hdl(), passes the OUI check and then makes the memcmp() and memcpy() at pIE->data + 6 read past the end of the element. OnAssocRsp() parses a frame received from the AP, so this is reachable from a remote peer. The remaining caller in rtw_wlan_util.c already guards the handler with "pIE->length == WLAN_WMM_LEN". Move the equivalent check into the handler itself so every caller is covered; the sibling IE handlers in the same parsing loop (HT_caps_handler(), HT_info_handler(), ERP_IE_handler()) likewise bound their accesses by pIE->length.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 5df2fd06567df5f178c8faae0bdaefd203618d21; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 2bee6f7a0f0125238951e31da2e96d06fe359043; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 1158b9931207392d6dd136aa0c4be18893b50fa1; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ce2399717de242344880044b91a20a712644fdfb; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before e5b7610008f4e6a80c8b071aa77ddbd5e17ea472; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before ae21407350151bddfd4fea7aa39bd0643c0ca9d3 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.10.267 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.152 through 6.6.*; unaffected 6.12.104 through 6.12.*; unaffected 6.18.45 through 6.18.*; unaffected 7.1.9 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5df2fd06567df5f178c8faae0bdaefd203618d21
- https://git.kernel.org/stable/c/6cdca4c8b64c15a3ab9ad7a85f482e9519eadf93
- https://git.kernel.org/stable/c/2bee6f7a0f0125238951e31da2e96d06fe359043
- https://git.kernel.org/stable/c/1158b9931207392d6dd136aa0c4be18893b50fa1
- https://git.kernel.org/stable/c/ce2399717de242344880044b91a20a712644fdfb
- https://git.kernel.org/stable/c/e5b7610008f4e6a80c8b071aa77ddbd5e17ea472
- https://git.kernel.org/stable/c/e429c6dfd5d2324cd866daaf4c29d5cfe4dea0e4
- https://git.kernel.org/stable/c/ae21407350151bddfd4fea7aa39bd0643c0ca9d3