In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: auth_enable: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, but that would increase the size of this fix, while 'sctp.ctl_sock' still needs to be retrieved from 'net' structure.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sctp: sysctl: auth_enable: evitar usar current->nsproxy Como se mencionó en un commit anterior de esta serie, no se recomienda usar la estructura 'net' a través de 'current' por diferentes razones: - Inconsistencia: obtener información de los netns del lector/escritor vs solo de los netns del abridor. - current->nsproxy puede ser NULL en algunos casos, lo que resulta en un 'Oops' (null-ptr-deref), p. ej. cuando la tarea actual está saliendo, como lo detectó syzbot [1] usando acct(2). La estructura 'net' se puede obtener de table->data usando Container_of(). Tenga en cuenta que table->data también se puede usar directamente, pero eso aumentaría el tamaño de esta corrección, mientras que 'sctp.ctl_sock' aún necesita ser recuperado de la estructura 'net'.
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-476
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd308688640> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd384432a00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd39c4e7800> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36ac49e00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd30868b400> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd30868ac80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3695d9840> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2dbc1d840> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd3686a51c0> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd308688980> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd39c4e6340> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd39c4e6fc0> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd39c4e4b40> | Operating System |
| linux | linux_kernel | 6.13 | <built-in method update of dict object at 0x7fd36ac49b00> | 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:*:*:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:* |