cve-2021-47102
Vulnerability from cvelistv5
Published
2024-03-04 18:10
Modified
2024-12-19 07:35
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: marvell: prestera: fix incorrect structure access
In line:
upper = info->upper_dev;
We access upper_dev field, which is related only for particular events
(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory
access for another events,
when ptr is not netdev_notifier_changeupper_info.
The KASAN logs are as follows:
[ 30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]
[ 30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778
[ 30.139866]
[ 30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6
[ 30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)
[ 30.153056] Call trace:
[ 30.155547] dump_backtrace+0x0/0x2c0
[ 30.159320] show_stack+0x18/0x30
[ 30.162729] dump_stack_lvl+0x68/0x84
[ 30.166491] print_address_description.constprop.0+0x74/0x2b8
[ 30.172346] kasan_report+0x1e8/0x250
[ 30.176102] __asan_load8+0x98/0xe0
[ 30.179682] prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]
[ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]
[ 30.193313] raw_notifier_call_chain+0x74/0xa0
[ 30.197860] call_netdevice_notifiers_info+0x68/0xc0
[ 30.202924] register_netdevice+0x3cc/0x760
[ 30.207190] register_netdev+0x24/0x50
[ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]
References
Impacted products
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"title": "net: marvell: prestera: fix incorrect structure access",
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"cveId": "CVE-2021-47102",
"datePublished": "2024-03-04T18:10:56.018Z",
"dateReserved": "2024-02-29T22:33:44.301Z",
"dateUpdated": "2024-12-19T07:35:16.339Z",
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"nvd": "{\"cve\":{\"id\":\"CVE-2021-47102\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-04T18:15:08.600\",\"lastModified\":\"2024-11-21T06:35:24.150\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: marvell: prestera: fix incorrect structure access\\n\\nIn line:\\n\\tupper = info-\u003eupper_dev;\\nWe access upper_dev field, which is related only for particular events\\n(e.g. event == NETDEV_CHANGEUPPER). So, this line cause invalid memory\\naccess for another events,\\nwhen ptr is not netdev_notifier_changeupper_info.\\n\\nThe KASAN logs are as follows:\\n\\n[ 30.123165] BUG: KASAN: stack-out-of-bounds in prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\\n[ 30.133336] Read of size 8 at addr ffff80000cf772b0 by task udevd/778\\n[ 30.139866]\\n[ 30.141398] CPU: 0 PID: 778 Comm: udevd Not tainted 5.16.0-rc3 #6\\n[ 30.147588] Hardware name: DNI AmazonGo1 A7040 board (DT)\\n[ 30.153056] Call trace:\\n[ 30.155547] dump_backtrace+0x0/0x2c0\\n[ 30.159320] show_stack+0x18/0x30\\n[ 30.162729] dump_stack_lvl+0x68/0x84\\n[ 30.166491] print_address_description.constprop.0+0x74/0x2b8\\n[ 30.172346] kasan_report+0x1e8/0x250\\n[ 30.176102] __asan_load8+0x98/0xe0\\n[ 30.179682] prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera]\\n[ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera]\\n[ 30.193313] raw_notifier_call_chain+0x74/0xa0\\n[ 30.197860] call_netdevice_notifiers_info+0x68/0xc0\\n[ 30.202924] register_netdevice+0x3cc/0x760\\n[ 30.207190] register_netdev+0x24/0x50\\n[ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: net:marvell:prestera: corrige el acceso a la estructura incorrecta En l\u00ednea: superior = info-\u0026gt;upper_dev; Accedemos al campo Upper_dev, que est\u00e1 relacionado s\u00f3lo para eventos particulares (por ejemplo, evento == NETDEV_CHANGEUPPER). Entonces, esta l\u00ednea causa un acceso no v\u00e1lido a la memoria para otros eventos, cuando ptr no es netdev_notifier_changeupper_info. Los registros de KASAN son los siguientes: [30.123165] ERROR: KASAN: pila fuera de los l\u00edmites en prestera_netdev_port_event.constprop.0+0x68/0x538 [prestera] [30.133336] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff80000cf772b0 mediante tarea udevd/778 [ 0x0/0 x2c0 [ 30.159320] show_stack+0x18/0x30 [ 30.162729] dump_stack_lvl+0x68/0x84 [ 30.166491] print_address_description.constprop.0+0x74/0x2b8 [ 30.172346] kasan_report+0x1e8/0x250 [ 3 0.176102] __asan_load8+0x98/0xe0 [ 30.179682] prestera_netdev_port_event.constprop .0+0x68/0x538 [prestera] [ 30.186847] prestera_netdev_event_handler+0x1b4/0x1c0 [prestera] [ 30.193313] raw_notifier_call_chain+0x74/0xa0 [ 30.197860] call_netdevice_notifiers_info+0x68/0xc0 [ 30.202924] registro_netdevice+0x3cc/0x760 [ 30.207190] registro_netdev+0x24 /0x50 [ 30.211015] prestera_device_register+0x8a0/0xba0 [prestera]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2efc2256febf214e7b2bdaa21fe6c3c3146acdcb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/5c553a0cd1263e4da5f220d80fa713fc3959c1d0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.