Description
In the Linux kernel, the following vulnerability has been resolved: usb: usblp: fix heap leak in IEEE 1284 device ID via short response usblp_ctrl_msg() collapses the usb_control_msg() return value to 0/-errno, discarding the actual number of bytes transferred. A broken printer can complete the GET_DEVICE_ID control transfer short and the driver has no way to know. usblp_cache_device_id_string() reads the 2-byte big-endian length prefix from the response and trusts it (clamped only to the buffer bounds). The buffer is kmalloc(1024) at probe time. A device that sends exactly two bytes (e.g. 0x03 0xFF, claiming a 1023-byte ID) leaves device_id_string[2..1022] holding stale kmalloc heap. That stale data is then exposed: - via the ieee1284_id sysfs attribute (sprintf("%s", buf+2), truncated at the first NUL in the stale heap), and - via the IOCNR_GET_DEVICE_ID ioctl, which copy_to_user()s the full claimed length regardless of NULs, up to 1021 bytes of uninitialized heap, with the leak size chosen by the device. Fix this up by just zapping the buffer with zeros before each request sent to the device.
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 < 4650cce898fcd0bb8c33e529984687a8caed10c3affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 612640abbd9e0947fe8f37aaf0cf324265d7caa4affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4220d4dd062ea3d3eb056a6cbe0b568e740d20b1affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6e29c32a27218f2dcd4a4e9b0b3c5e7728640698affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6d8142141c942c0d8e79343cffda9c44bb1f3f4faffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8247f52d822180e94ccbfdab91613af386a4e34daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 522d17e93a85575256894212d10e5a1fa6f36529affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7a400c6fe3617e31e690e3f7ca37bb335e0498f3affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.88 to ≤ 6.12.*unaffected6.18.30 to ≤ 6.18.*unaffected7.0.7 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/4650cce898fcd0bb8c33e529984687a8caed10c3 ↗
- https://git.kernel.org/stable/c/612640abbd9e0947fe8f37aaf0cf324265d7caa4 ↗
- https://git.kernel.org/stable/c/4220d4dd062ea3d3eb056a6cbe0b568e740d20b1 ↗
- https://git.kernel.org/stable/c/6e29c32a27218f2dcd4a4e9b0b3c5e7728640698 ↗
- https://git.kernel.org/stable/c/6d8142141c942c0d8e79343cffda9c44bb1f3f4f ↗
- https://git.kernel.org/stable/c/8247f52d822180e94ccbfdab91613af386a4e34d ↗
- https://git.kernel.org/stable/c/522d17e93a85575256894212d10e5a1fa6f36529 ↗
- https://git.kernel.org/stable/c/7a400c6fe3617e31e690e3f7ca37bb335e0498f3 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗