In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() In DecodeQ931(), the UserUserIE code path reads a 16-bit length from the packet, then decrements it by 1 to skip the protocol discriminator byte before passing it to DecodeH323_UserInformation(). If the encoded length is 0, the decrement wraps to -1, which is then passed as a large value to the decoder, leading to an out-of-bounds read. Add a check to ensure len is positive after the decrement.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
| Attack Vector | NETWORK |
|---|---|
| Attack Complexity | LOW |
| Privileges Required | NONE |
| User Interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality Impact | HIGH |
| Integrity Impact | NONE |
| Availability Impact | HIGH |
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Type: Secondary
Exploitability Score: 3.9
Impact Score: 5.2
| Source | Type | Description |
|---|---|---|
| [email protected] | Primary |
en
CWE-125
|
| Vendor | Product | Version | Update | Type |
|---|---|---|---|---|
| linux | linux_kernel | * | <built-in method update of dict object at 0x702ba6a6f4c0> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdcf6af80> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdcf6a480> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdd348980> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702ba6a6e880> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702bdc50ed00> | Operating System |
| linux | linux_kernel | * | <built-in method update of dict object at 0x702ba6a6cf80> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdc50dcc0> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702ba6a6ef40> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702ba6a6ef80> | Operating System |
| linux | linux_kernel | 7.0 | <built-in method update of dict object at 0x702bdc50e640> | 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:*:*:*:*:*:* |
| Yes | cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* |