In the Linux kernel, the following vulnerability has been resolved: net: nexthop: Initialize all fields in dumped nexthops struct nexthop_grp contains two reserved fields that are not initialized by nla_put_nh_group(), and carry garbage. This can be observed e.g. with strace (edited for clarity): # ip nexthop add id 1 dev lo # ip nexthop add id 101 group 1 # strace -e recvmsg ip nexthop get id 101 ... recvmsg(... [{nla_len=12, nla_type=NHA_GROUP}, [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52 The fields are reserved and therefore not currently used. But as they are, they leak kernel memory, and the fact they are not just zero complicates repurposing of the fields for new ends. Initialize the full structure.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: nexthop: inicializa todos los campos en la estructura nexthops volcada. nexthop_grp contiene dos campos reservados que no son inicializados por nla_put_nh_group() y transporta basura. Esto se puede observar, por ejemplo, con strace (editado para mayor claridad): # ip nexthop add id 1 dev lo # ip nexthop add id 101 group 1 # strace -e recvmsg ip nexthop get id 101 ... recvmsg(... [{nla_len =12, nla_type=NHA_GROUP}, [{id=1, peso=0, resvd1=0x69, resvd2=0x67}]] ...) = 52 Los campos están reservados y, por lo tanto, no se utilizan actualmente. Pero tal como están, pierden memoria del núcleo, y el hecho de que no sean simplemente cero complica la reutilización de los campos para nuevos fines. Inicialice la estructura completa.
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-908
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd3412416c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd384a83cc0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd384a83040> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd34927f800> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd341240100> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd341242e40> | 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:*:*:*:*:*:*:*:* |