In the Linux kernel, the following vulnerability has been resolved: ip6_vti: fix incorrect tunnel matching in vti6_tnl_lookup() In vti6_tnl_lookup(), when an exact match for a tunnel fails, the code falls back to searching for wildcard tunnels: - Tunnels matching the packet's local address, with any remote address wildcard remote). - Tunnels matching the packet's remote address, with any local address (wildcard local). However, vti6 stores all these different types of tunnels in the same hash table (ip6n->tnls_r_l) prone to hash collisions. The bug is that the fallback search loops in vti6_tnl_lookup() were missing checks to ensure that the candidate tunnel actually has a wildcard address.
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 0x7fd37039a540> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd37039b240> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36b3f9cc0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd36b3f9780> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd370399880> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd37039ae80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x7fd319c772c0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd36b3f90c0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd37039ba00> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd3703992c0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd36be61cc0> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd2d8149c80> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd3420ba340> | Operating System |
| linux | linux_kernel | 7.1 | <built-in method update of dict object at 0x7fd39c444340> | 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:7.1:rc1:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* |