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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-401
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34bce1940> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3854b2a80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd340893ec0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd370321f40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34bce0f40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34bce0e40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36baccf80> | Operating System |
| linux | linux_kernel | 2.6.12 | <built-in method update of dict object at 0x7fd3408937c0> | Operating System |
| linux | linux_kernel | 2.6.12 | <built-in method update of dict object at 0x7fd36ada0940> | Operating System |
| linux | linux_kernel | 2.6.12 | <built-in method update of dict object at 0x7fd34bce1f00> | Operating System |
| linux | linux_kernel | 2.6.12 | <built-in method update of dict object at 0x7fd340892040> | Operating System |
| linux | linux_kernel | 2.6.12 | <built-in method update of dict object at 0x7fd3854b0680> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd38551d600> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd38551cf80> | Operating System |
| Vulnerable | CPE |
|---|---|
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* |