Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix OOB write in HT_caps_handler() HT_caps_handler() iterates pIE->length bytes and writes into HT_caps.u.HT_cap[], which is a fixed 26-byte array (sizeof struct HT_caps_element). Because pIE->length is a raw u8 from an over-the-air 802.11 AssocResponse frame and is never validated, a malicious AP can set it up to 255, causing up to 229 bytes of out-of-bounds writes into adjacent fields of struct mlme_ext_info. Truncate the iteration count to the size of HT_caps.u.HT_cap using umin() so that data from a longer-than-expected IE is silently ignored rather than written out of bounds, preserving interoperability with APs that pad the element. An early return on oversized IEs was considered but rejected: it would bypass the pmlmeinfo->HT_caps_enable = 1 assignment that precedes the loop, silently disabling HT mode for APs that append extra bytes to the HT Capabilities IE.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 37f642d47c3648a707df3ceb092eee1adffbfd28; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 8c872b47c7fc32e95e0da1db7512388794adcd69; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before bb3b942da4123b55d1cacf19d1a7d5ba15dbf83a; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 918537a0fbed85aab61fa28ad75e6279070610c9; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 6f91621fc45025ad3c0be796b70e6e4cee22fc69; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 225b6d3fc7e99ac3d20b6c861d1e47d24e7ea31d; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before f8001e1a516ba3b495728c65b61f799cbfad6bd0 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/37f642d47c3648a707df3ceb092eee1adffbfd28
- https://git.kernel.org/stable/c/8c872b47c7fc32e95e0da1db7512388794adcd69
- https://git.kernel.org/stable/c/bb3b942da4123b55d1cacf19d1a7d5ba15dbf83a
- https://git.kernel.org/stable/c/918537a0fbed85aab61fa28ad75e6279070610c9
- https://git.kernel.org/stable/c/6f91621fc45025ad3c0be796b70e6e4cee22fc69
- https://git.kernel.org/stable/c/225b6d3fc7e99ac3d20b6c861d1e47d24e7ea31d
- https://git.kernel.org/stable/c/f8001e1a516ba3b495728c65b61f799cbfad6bd0
ADP enrichment
No English description supplied.
No references supplied.