Description
In the Linux kernel, the following vulnerability has been resolved: cdrom: fix stack out-of-bounds read in CDROMVOLCTRL mmc_ioctl_cdrom_volume() first reads the audio control mode page into a 32-byte stack buffer with cgc->buflen set to 24. If the device reports a block descriptor, the function increases cgc->buflen to include that descriptor and reads the page again. For CDROMVOLCTRL, the function then builds a MODE SELECT parameter list by moving cgc->buffer forward by offset - 8 bytes. This drops the block descriptor from the outgoing payload and leaves a new 8-byte mode parameter header in front of the audio control page. However, cgc->buflen is left unchanged. With a standard 8-byte block descriptor, cgc->buffer points at buffer + 8 but cgc->buflen remains 32. cdrom_mode_select() therefore asks the low level packet path to write 32 bytes from that adjusted pointer, reading 8 bytes past the end of the 32-byte stack buffer. This is not hit by CDROMVOLREAD, and CDROMVOLCTRL only triggers it on drives that return a non-zero block descriptor length, which helps explain why it has gone unnoticed. The overread is also sent to the device as extra MODE SELECT payload, so it may not produce an obvious local failure. Reduce cgc->buflen by the same amount as the buffer pointer adjustment so the MODE SELECT transfer covers only the intended parameter list.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 45c65df5339deea3cf204902aac383fe995941a7affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0329b661349f42f9616f2733da67edffbbb8455daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e150c9a10baee55d3bfbc96dbe66b205e8b4fd44affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7344c84e32413e5c8832f74b8a612b0194e5c051affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 35b68e24c5a69fa4545f46f05f6c849223034cb6affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d43c5c0c935522deae7339e0c2399365f3bf0016affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f3e2715a150066f09aa82c30fa983fb184ad6dd5affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b27e195d4db8dea263050bdbeb11881b2999c9c6affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/45c65df5339deea3cf204902aac383fe995941a7 ↗
- https://git.kernel.org/stable/c/0329b661349f42f9616f2733da67edffbbb8455d ↗
- https://git.kernel.org/stable/c/e150c9a10baee55d3bfbc96dbe66b205e8b4fd44 ↗
- https://git.kernel.org/stable/c/7344c84e32413e5c8832f74b8a612b0194e5c051 ↗
- https://git.kernel.org/stable/c/35b68e24c5a69fa4545f46f05f6c849223034cb6 ↗
- https://git.kernel.org/stable/c/d43c5c0c935522deae7339e0c2399365f3bf0016 ↗
- https://git.kernel.org/stable/c/f3e2715a150066f09aa82c30fa983fb184ad6dd5 ↗
- https://git.kernel.org/stable/c/b27e195d4db8dea263050bdbeb11881b2999c9c6 ↗