In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix NFSv3 SETATTR/CREATE's handling of large file sizes iattr::ia_size is a loff_t, so these NFSv3 procedures must be careful to deal with incoming client size values that are larger than s64_max without corrupting the value. Silently capping the value results in storing a different value than the client passed in which is unexpected behavior, so remove the min_t() check in decode_sattr3(). Note that RFC 1813 permits only the WRITE procedure to return NFS3ERR_FBIG. We believe that NFSv3 reference implementations also return NFS3ERR_FBIG when ia_size is too large.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFSD: corrige el manejo de NFSv3 SETATTR/CREATE de archivos de gran tamaño iattr::ia_size es un loff_t, por lo que estos procedimientos de NFSv3 deben tener cuidado al tratar con valores de tamaño de cliente entrantes que son mayores que s64_max sin corromper el valor. Limitar silenciosamente el valor da como resultado que se almacene un valor diferente al que pasó el cliente, lo cual es un comportamiento inesperado, por lo tanto, elimine la verificación min_t() en decode_sattr3(). Tenga en cuenta que RFC 1813 sólo permite que el procedimiento WRITE devuelva NFS3ERR_FBIG. Creemos que las implementaciones de referencia de NFSv3 también devuelven NFS3ERR_FBIG cuando ia_size es demasiado grande.
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
NVD-CWE-noinfo
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36059f9c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4d7c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4eac0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ad4f000> | Operating System |
| linux | linux_kernel | 5.17 | <built-in method update of dict object at 0x7fd36059ef80> | Operating System |
| linux | linux_kernel | 5.17 | <built-in method update of dict object at 0x7fd36059dec0> | Operating System |
| linux | linux_kernel | 5.17 | <built-in method update of dict object at 0x7fd349464840> | 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:5.17:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:5.17:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:5.17:rc3:*:*:*:*:*:* |