Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire: isight: bound the sample count to the packet payload isight_packet() takes the frame count from the device iso packet and checks it only against the device claimed iso length. count = be32_to_cpu(payload->sample_count); if (likely(count <= (length - 16) / 4)) isight_samples(isight, payload->samples, count); length is the iso header data_length. It can be up to 0xffff. So the gate allows a count up to about 16379. isight_samples() then copies count frames out of payload->samples into the PCM DMA buffer. payload->samples holds only 2 * MAX_FRAMES_PER_PACKET values. The device multiplexes two samples per frame. A count past MAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer size writes past runtime->dma_area. The smallest PCM buffer is larger than MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET keeps both the read and the write in range. A malicious or faulty Apple iSight on the FireWire bus reaches this during a normal capture. Add the MAX_FRAMES_PER_PACKET bound to the gate.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 24423e0a9251d348c3f1fb0bb0e61b879e1e976c; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before ebbffacda6733dcbcef601b5b523460f8d8b671e; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 57e4d9043afc1eaddee8f50d11def6e65415d273; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 31da82b9676c6b112e7c72c7529e6812b919742a; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 8e48a29813df8dd71503800b7acf69c12c035045; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 31a01b70bb90e3ef3147f308e2ea899e1d2485ca; affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c before 29b9667982e4df2ed7744f86b1144f8bb58eb698 |
| Linux / Linux | affected 3.0; unaffected 0 before 3.0; 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/24423e0a9251d348c3f1fb0bb0e61b879e1e976c
- https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e
- https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273
- https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478
- https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a
- https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045
- https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca
- https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698