In the Linux kernel, the following vulnerability has been resolved:
team: fix null-ptr-deref when team device type is changed
Get a null-ptr-deref bug as follows with reproducer [1].
BUG: kernel NULL pointer dereference, address: 0000000000000228
...
RIP: 0010:vlan_dev_hard_header+0x35/0x140 [8021q]
...
Call Trace:
<TASK>
? __die+0x24/0x70
? page_fault_oops+0x82/0x150
? exc_page_fault+0x69/0x150
? asm_exc_page_fault+0x26/0x30
? vlan_dev_hard_header+0x35/0x140 [8021q]
? vlan_dev_hard_header+0x8e/0x140 [8021q]
neigh_connected_output+0xb2/0x100
ip6_finish_output2+0x1cb/0x520
? nf_hook_slow+0x43/0xc0
? ip6_mtu+0x46/0x80
ip6_finish_output+0x2a/0xb0
mld_sendpack+0x18f/0x250
mld_ifc_work+0x39/0x160
process_one_work+0x1e6/0x3f0
worker_thread+0x4d/0x2f0
? __pfx_worker_thread+0x10/0x10
kthread+0xe5/0x120
? __pfx_kthread+0x10/0x10
ret_from_fork+0x34/0x50
? __pfx_kthread+0x10/0x10
ret_from_fork_asm+0x1b/0x30
[1]
$ teamd -t team0 -d -c '{"runner": {"name": "loadbalance"}}'
$ ip link add name t-dummy type dummy
$ ip link add link t-dummy name t-dummy.100 type vlan id 100
$ ip link add name t-nlmon type nlmon
$ ip link set t-nlmon master team0
$ ip link set t-nlmon nomaster
$ ip link set t-dummy up
$ ip link set team0 up
$ ip link set t-dummy.100 down
$ ip link set t-dummy.100 master team0
When enslave a vlan device to team device and team device type is changed
from non-ether to ether, header_ops of team device is changed to
vlan_header_ops. That is incorrect and will trigger null-ptr-deref
for vlan->real_dev in vlan_dev_hard_header() because team device is not
a vlan device.
Cache eth_header_ops in team_setup(), then assign cached header_ops to
header_ops of team net device when its type is changed from non-ether
to ether to fix the bug.
References
Configurations
Configuration 1 (hide)
|
History
11 Dec 2024, 15:30
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/1779eb51b9cc628cee551f252701a85a2a50a457 - Patch | |
| References | () https://git.kernel.org/stable/c/2f0acb0736ecc3eb85dc80ad2790d634dcb10b58 - Patch | |
| References | () https://git.kernel.org/stable/c/492032760127251e5540a5716a70996bacf2a3fd - Patch | |
| References | () https://git.kernel.org/stable/c/a7fb47b9711101d2405b0eb1276fb1f9b9b270c7 - Patch | |
| References | () https://git.kernel.org/stable/c/b44dd92e2afd89eb6e9d27616858e72a67bdc1a7 - Patch | |
| References | () https://git.kernel.org/stable/c/c5f6478686bb45f453031594ae19b6c9723a780d - Patch | |
| References | () https://git.kernel.org/stable/c/cac50d9f5d876be32cb9aa21c74018468900284d - Patch | |
| References | () https://git.kernel.org/stable/c/cd05eec2ee0cc396813a32ef675634e403748255 - Patch | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux linux Kernel
Linux |
|
| CWE | CWE-476 | |
| CPE | cpe:2.3:o:linux:linux_kernel:6.6:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.6:rc1:*:*:*:*:*:* |
Information
Published : 2024-03-02 22:15
Updated : 2024-12-11 15:30
NVD link : CVE-2023-52574
Mitre link : CVE-2023-52574
CVE.ORG link : CVE-2023-52574
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference