Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: iio: gyro: itg3200: fix i2c read into the wrong stack location itg3200_read_all_channels() takes `__be16 *buf' as a parameter and fills the i2c_msg destination as `(char *)&buf'. Since `buf' is the parameter (a pointer), `&buf' is the address of the local pointer slot on the stack of itg3200_read_all_channels(), not the address of the caller's scan buffer. The (char *) cast hides the type mismatch. i2c_transfer() therefore writes ITG3200_SCAN_ELEMENTS * sizeof(s16) = 8 bytes into the parameter's stack slot, which is discarded when the function returns. The caller's scan buffer in itg3200_trigger_handler() is never written to, so iio_push_to_buffers_with_timestamp() pushes uninitialised stack contents to userspace via /dev/iio:deviceX every scan -- both a functional bug (no actual gyroscope or temperature data is delivered through the triggered buffer) and an information leak. The non-buffered read_raw() path is unaffected: it goes through itg3200_read_reg_s16() which uses `&out' on a local s16 value, where that is correct. Drop the spurious `&' so the i2c read writes into the caller's buffer.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b before 90e809376b0f0d1ddec2eec954aecdd2a5b40b0e; affected 9dbf091da080508e9f632d307f357beb79a0766b before 8654b5e2617819ff4f7c78071dfd0275e971a9b6; affected 9dbf091da080508e9f632d307f357beb79a0766b before b64dd5f3b38911054cbcc570df617e3e8e75e562; affected 9dbf091da080508e9f632d307f357beb79a0766b before 31bbd4b87dd6701fa10e03ba7f6268e49e178d16; affected 9dbf091da080508e9f632d307f357beb79a0766b before 63203bd072b613c18c237b906b1c9d2dc4527337; affected 9dbf091da080508e9f632d307f357beb79a0766b before 15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1; affected 9dbf091da080508e9f632d307f357beb79a0766b before cfc3283859cfdeacadf80d5e6880bdf871ffeaa6; affected 9dbf091da080508e9f632d307f357beb79a0766b before 6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae |
| Linux / Linux | affected 3.9; unaffected 0 before 3.9; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e
- https://git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6
- https://git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562
- https://git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16
- https://git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337
- https://git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1
- https://git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6
- https://git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae