In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_expect: use expect->helper Use expect->helper in ctnetlink and /proc to dump the helper name. Using nfct_help() without holding a reference to the master conntrack is unsafe. Use exp->master->helper in ctnetlink path if userspace does not provide an explicit helper when creating an expectation to retain the existing behaviour. The ctnetlink expectation path holds the reference on the master conntrack and nf_conntrack_expect lock and the nfnetlink glue path refers to the master ct that is attached to the skb.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
| Attack Vector | NETWORK |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | NONE |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | HIGH |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 3.9
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 0x702bde4f32c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcbbf5480> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcbbf60c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcbbf41c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bcbbf7780> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bcbbf7ec0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bcbbf4600> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bde4f0c80> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bcbbf7700> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bcbbf6880> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bde4f2cc0> | 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: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:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* |