In the Linux kernel, the following vulnerability has been resolved: ethtool: check device is present when getting link settings A sysfs reader can race with a device reset or removal, attempting to read device state when the device is not actually present. eg: [exception RIP: qed_get_current_link+17] #8 [ffffb9e4f2907c48] qede_get_link_ksettings at ffffffffc07a994a [qede] #9 [ffffb9e4f2907cd8] __rh_call_get_link_ksettings at ffffffff992b01a3 #10 [ffffb9e4f2907d38] __ethtool_get_link_ksettings at ffffffff992b04e4 #11 [ffffb9e4f2907d90] duplex_show at ffffffff99260300 #12 [ffffb9e4f2907e38] dev_attr_show at ffffffff9905a01c #13 [ffffb9e4f2907e50] sysfs_kf_seq_show at ffffffff98e0145b #14 [ffffb9e4f2907e68] seq_read at ffffffff98d902e3 #15 [ffffb9e4f2907ec8] vfs_read at ffffffff98d657d1 #16 [ffffb9e4f2907f00] ksys_read at ffffffff98d65c3f #17 [ffffb9e4f2907f38] do_syscall_64 at ffffffff98a052fb crash> struct net_device.state ffff9a9d21336000 state = 5, state 5 is __LINK_STATE_START (0b1) and __LINK_STATE_NOCARRIER (0b100). The device is not present, note lack of __LINK_STATE_PRESENT (0b10). This is the same sort of panic as observed in commit 4224cfd7fb65 ("net-sysfs: add check for netdevice being present to speed_show"). There are many other callers of __ethtool_get_link_ksettings() which don't have a device presence check. Move this check into ethtool to protect all callers.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ethtool: comprobar la presencia del dispositivo al obtener la configuración del enlace Un lector sysfs puede competir con un reinicio o eliminación del dispositivo, intentando leer el estado del dispositivo cuando este no está realmente presente. p. ej.: [excepción RIP: qed_get_current_link+17] #8 [ffffb9e4f2907c48] qede_get_link_ksettings en ffffffffc07a994a [qede] #9 [ffffb9e4f2907cd8] __rh_call_get_link_ksettings en ffffffff992b01a3 #10 [ffffb9e4f2907d38] __ethtool_get_link_ksettings en ffffffff992b04e4 #11 [ffffb9e4f2907d90] duplex_show en ffffffff99260300 #12 [ffffb9e4f2907e38] dev_attr_show en ffffffff9905a01c #13 [ffffb9e4f2907e50] sysfs_kf_seq_show en ffffffff98e0145b #14 [ffffb9e4f2907e68] seq_read en ffffffff98d902e3 #15 [ffffb9e4f2907ec8] vfs_read en ffffffff98d657d1 #16 [ffffb9e4f2907f00] ksys_read en ffffffff98d65c3f #17 [ffffb9e4f2907f38] do_syscall_64 en ffffffff98a052fb bloqueo> estructura net_device.state ffff9a9d21336000 estado = 5, el estado 5 es __LINK_STATE_START (0b1) y __LINK_STATE_NOCARRIER (0b100). El dispositivo no está presente, note la falta de __LINK_STATE_PRESENT (0b10). Este es el mismo tipo de pánico que se observa en el commit 4224cfd7fb65 ("net-sysfs: agregar verificación de presencia de netdevice a speed_show"). Hay muchos otros invocadores de __ethtool_get_link_ksettings() que no tienen una verificación de presencia de dispositivo. Mueva esta verificación a ethtool para proteger a todos los invocadores.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | HIGH |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
NVD-CWE-noinfo
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2dbd4eb00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36a714380> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34927fc80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3412f5780> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2dbd4da40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2dbd4c340> | Operating System |
| linux | linux_kernel | 6.11 | <built-in method update of dict object at 0x7fd2dbd4fc40> | Operating System |
| linux | linux_kernel | 6.11 | <built-in method update of dict object at 0x7fd369a591c0> | Operating System |
| linux | linux_kernel | 6.11 | <built-in method update of dict object at 0x7fd370344640> | Operating System |
| linux | linux_kernel | 6.11 | <built-in method update of dict object at 0x7fd2dbd4c700> | Operating System |
| linux | linux_kernel | 6.11 | <built-in method update of dict object at 0x7fd3412f4e00> | 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:6.11:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* |