In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_IDLETIMER: reject rev0 reuse of ALARM timer labels IDLETIMER revision 0 rules reuse existing timers by label and always call mod_timer() on timer->timer. If the label was created first by revision 1 with XT_IDLETIMER_ALARM, the object uses alarm timer semantics and timer->timer is never initialized. Reusing that object from revision 0 causes mod_timer() on an uninitialized timer_list, triggering debugobjects warnings and possible panic when panic_on_warn=1. Fix this by rejecting revision 0 rule insertion when an existing timer with the same label is of ALARM type.
En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: netfilter: xt_IDLETIMER: rechazar la reutilización de rev0 de etiquetas de temporizador ALARM Las reglas de la revisión 0 de IDLETIMER reutilizan temporizadores existentes por etiqueta y siempre llaman a mod_timer() en timer->timer. Si la etiqueta fue creada primero por la revisión 1 con XT_IDLETIMER_ALARM, el objeto utiliza semántica de temporizador de alarma y timer->timer nunca se inicializa. Reutilizar ese objeto de la revisión 0 causa mod_timer() en una timer_list no inicializada, lo que activa advertencias de debugobjects y un posible pánico cuando panic_on_warn=1. Solucione esto rechazando la inserción de reglas de la revisión 0 cuando un temporizador existente con la misma etiqueta es de tipo ALARM.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 1.8
Impact Score: 5.9
| 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 0x702bfc337600> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702b8344e380> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdd67fe40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702b8052d800> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bfc335640> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bfc337f40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702b80e2cec0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bfc1ddc40> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdd67ff00> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bfc337300> | 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:7.0:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* |