In the Linux kernel, the following vulnerability has been resolved: bpf: Allow delete from sockmap/sockhash only if update is allowed We have seen an influx of syzkaller reports where a BPF program attached to a tracepoint triggers a locking rule violation by performing a map_delete on a sockmap/sockhash. We don't intend to support this artificial use scenario. Extend the existing verifier allowed-program-type check for updating sockmap/sockhash to also cover deleting from a map. From now on only BPF programs which were previously allowed to update sockmap/sockhash can delete from these map types.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: permitir la eliminación de sockmap/sockhash solo si se permite la actualización. Hemos visto una afluencia de informes de syzkaller donde un programa BPF adjunto a un punto de seguimiento desencadena una violación de la regla de bloqueo al realizar un map_delete en un mapa de calcetines/sockhash. No pretendemos apoyar este escenario de uso artificial. Amplíe la verificación de tipo de programa permitido del verificador existente para actualizar sockmap/sockhash para cubrir también la eliminación de un mapa. De ahora en adelante, sólo los programas BPF a los que anteriormente se les permitía actualizar sockmap/sockhash pueden eliminar de estos tipos de mapas.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | HIGH |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | NONE |
| Integrity Impact | HIGH |
| Availability Impact | NONE |
| 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 0x7fd31062a640> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd38492a580> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd384929fc0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd38492ad40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36b8cc640> | Operating System |
| linux | linux_kernel | 6.10.0 | <built-in method update of dict object at 0x7fd36b8cd240> | 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:6.10.0:rc1:*:*:*:*:*:* |