Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: staging: rtl8723bs: fix WEP length underflow and OOB read in OnAuth() OnAuth() has two bugs in the shared-key authentication path. When the Privacy bit is set, rtw_wep_decrypt() is called without verifying that the frame is long enough to contain a valid WEP IV and ICV. Inside rtw_wep_decrypt(), length is computed as: length = len - WLAN_HDR_A3_LEN - iv_len and then passed as (length - 4) to crc32_le(). If len is less than WLAN_HDR_A3_LEN + iv_len + icv_len (32 bytes), length - 4 is negative and, after the implicit cast to size_t, causes crc32_le() to read far beyond the frame buffer. Add a minimum length check before accessing the IV field and calling the decryption path. When processing a seq=3 response, rtw_get_ie() stores the Challenge Text IE length in ie_len, but the subsequent memcmp() always reads 128 bytes regardless of ie_len. IEEE 802.11 mandates a challenge text of exactly 128 bytes; reject any IE whose length field differs, matching the check already applied to OnAuthClient().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 665e1ecb68b4e8419604e70a33f02d1c8b0222c6; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before c9000c93078e5c0a5a651b077c0ec92a4bc7d580; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 1f6c9d255bdda41216b6e34c96aa2b1abee0bb84; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 3e44a7665f3abd320a80d9c64ee4a93317041b8b; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before 64ec4192d9c10e96922245d4a6747304cc76b19d; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before d90b9f39f375c9826ef145605dfe97765d0ecb91; affected 554c0a3abf216c991c5ebddcdb2c08689ecd290b before a1fc19d61f661d47204f095b593de507884849f7 |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.10.261 through 5.10.*; 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/665e1ecb68b4e8419604e70a33f02d1c8b0222c6
- https://git.kernel.org/stable/c/87cccc2a767f17dcab71e3b9fe5ae29b5516c5ce
- https://git.kernel.org/stable/c/c9000c93078e5c0a5a651b077c0ec92a4bc7d580
- https://git.kernel.org/stable/c/1f6c9d255bdda41216b6e34c96aa2b1abee0bb84
- https://git.kernel.org/stable/c/3e44a7665f3abd320a80d9c64ee4a93317041b8b
- https://git.kernel.org/stable/c/64ec4192d9c10e96922245d4a6747304cc76b19d
- https://git.kernel.org/stable/c/d90b9f39f375c9826ef145605dfe97765d0ecb91
- https://git.kernel.org/stable/c/a1fc19d61f661d47204f095b593de507884849f7
ADP enrichment
No English description supplied.
No references supplied.