In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: add missing netlink policy validations Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink. These attributes are used by the kernel without any validation. Extend the netlink policies accordingly. Quoting the reporter: nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE value directly to ct->proto.sctp.state without checking that it is within the valid range. [..] and: ... with exp->dir = 100, the access at ct->master->tuplehash[100] reads 5600 bytes past the start of a 320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by UBSAN.
En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: netfilter: conntrack: añadir validaciones de políticas netlink faltantes Hyunwoo Kim informa de acceso fuera de límites en sctp y ctnetlink. Estos atributos son utilizados por el kernel sin ninguna validación. Extender las políticas netlink en consecuencia. Citando al informante: 'nlattr_to_sctp() asigna el valor CTA_PROTOINFO_SCTP_STATE proporcionado por el usuario directamente a ct -> proto.sctp.state sin comprobar que esté dentro del rango válido. [..] y: ... con exp -> dir = 100, el acceso en ct -> master -> tuplehash[100] lee 5600 bytes más allá del inicio de un objeto nf_conn de 320 bytes, causando una lectura fuera de límites de slab confirmada por UBSAN.'
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
| Attack Vector | LOCAL |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | LOW |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 1.8
Impact Score: 5.2
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-787
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2d39ffc40> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd2d39fe940> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd31b234200> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd319c74540> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7fd2d39ffdc0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7fd2d39ff7c0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7fd319c75dc0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x7fd319c75ec0> | 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: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:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* |