cve-2024-36972
Vulnerability from cvelistv5
Published
2024-06-10 14:57
Modified
2024-12-19 09:03
Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
af_unix: Update unix_sk(sk)->oob_skb under sk_receive_queue lock.
Billy Jheng Bing-Jhong reported a race between __unix_gc() and
queue_oob().
__unix_gc() tries to garbage-collect close()d inflight sockets,
and then if the socket has MSG_OOB in unix_sk(sk)->oob_skb, GC
will drop the reference and set NULL to it locklessly.
However, the peer socket still can send MSG_OOB message and
queue_oob() can update unix_sk(sk)->oob_skb concurrently, leading
NULL pointer dereference. [0]
To fix the issue, let's update unix_sk(sk)->oob_skb under the
sk_receive_queue's lock and take it everywhere we touch oob_skb.
Note that we defer kfree_skb() in manage_oob() to silence lockdep
false-positive (See [1]).
[0]:
BUG: kernel NULL pointer dereference, address: 0000000000000008
PF: supervisor write access in kernel mode
PF: error_code(0x0002) - not-present page
PGD 8000000009f5e067 P4D 8000000009f5e067 PUD 9f5d067 PMD 0
Oops: 0002 [#1] PREEMPT SMP PTI
CPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 6.9.0-rc5-00191-gd091e579b864 #110
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
Workqueue: events delayed_fput
RIP: 0010:skb_dequeue (./include/linux/skbuff.h:2386 ./include/linux/skbuff.h:2402 net/core/skbuff.c:3847)
Code: 39 e3 74 3e 8b 43 10 48 89 ef 83 e8 01 89 43 10 49 8b 44 24 08 49 c7 44 24 08 00 00 00 00 49 8b 14 24 49 c7 04 24 00 00 00 00 <48> 89 42 08 48 89 10 e8 e7 c5 42 00 4c 89 e0 5b 5d 41 5c c3 cc cc
RSP: 0018:ffffc900001bfd48 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff8880088f5ae8 RCX: 00000000361289f9
RDX: 0000000000000000 RSI: 0000000000000206 RDI: ffff8880088f5b00
RBP: ffff8880088f5b00 R08: 0000000000080000 R09: 0000000000000001
R10: 0000000000000003 R11: 0000000000000001 R12: ffff8880056b6a00
R13: ffff8880088f5280 R14: 0000000000000001 R15: ffff8880088f5a80
FS: 0000000000000000(0000) GS:ffff88807dd80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 0000000006314000 CR4: 00000000007506f0
PKRU: 55555554
Call Trace:
<TASK>
unix_release_sock (net/unix/af_unix.c:654)
unix_release (net/unix/af_unix.c:1050)
__sock_release (net/socket.c:660)
sock_close (net/socket.c:1423)
__fput (fs/file_table.c:423)
delayed_fput (fs/file_table.c:444 (discriminator 3))
process_one_work (kernel/workqueue.c:3259)
worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)
kthread (kernel/kthread.c:388)
ret_from_fork (arch/x86/kernel/process.c:153)
ret_from_fork_asm (arch/x86/entry/entry_64.S:257)
</TASK>
Modules linked in:
CR2: 0000000000000008
References
Impacted products
| Vendor | Product | Version | |||||
|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 4fe505c63aa3273135a57597fda761e9aecc7668 Version: e0e09186d8821ad59806115d347ea32efa43ca4b Version: b74aa9ce13d02b7fd37c5325b99854f91b9b4276 Version: 1279f9d9dec2d7462823a18c29ad61359e0a007d Version: 1279f9d9dec2d7462823a18c29ad61359e0a007d |
||||
|
|||||||
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"nvd": "{\"cve\":{\"id\":\"CVE-2024-36972\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-06-10T15:15:52.617\",\"lastModified\":\"2024-11-21T09:22:56.643\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\naf_unix: Update unix_sk(sk)-\u003eoob_skb under sk_receive_queue lock.\\n\\nBilly Jheng Bing-Jhong reported a race between __unix_gc() and\\nqueue_oob().\\n\\n__unix_gc() tries to garbage-collect close()d inflight sockets,\\nand then if the socket has MSG_OOB in unix_sk(sk)-\u003eoob_skb, GC\\nwill drop the reference and set NULL to it locklessly.\\n\\nHowever, the peer socket still can send MSG_OOB message and\\nqueue_oob() can update unix_sk(sk)-\u003eoob_skb concurrently, leading\\nNULL pointer dereference. [0]\\n\\nTo fix the issue, let\u0027s update unix_sk(sk)-\u003eoob_skb under the\\nsk_receive_queue\u0027s lock and take it everywhere we touch oob_skb.\\n\\nNote that we defer kfree_skb() in manage_oob() to silence lockdep\\nfalse-positive (See [1]).\\n\\n[0]:\\nBUG: kernel NULL pointer dereference, address: 0000000000000008\\n PF: supervisor write access in kernel mode\\n PF: error_code(0x0002) - not-present page\\nPGD 8000000009f5e067 P4D 8000000009f5e067 PUD 9f5d067 PMD 0\\nOops: 0002 [#1] PREEMPT SMP PTI\\nCPU: 3 PID: 50 Comm: kworker/3:1 Not tainted 6.9.0-rc5-00191-gd091e579b864 #110\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014\\nWorkqueue: events delayed_fput\\nRIP: 0010:skb_dequeue (./include/linux/skbuff.h:2386 ./include/linux/skbuff.h:2402 net/core/skbuff.c:3847)\\nCode: 39 e3 74 3e 8b 43 10 48 89 ef 83 e8 01 89 43 10 49 8b 44 24 08 49 c7 44 24 08 00 00 00 00 49 8b 14 24 49 c7 04 24 00 00 00 00 \u003c48\u003e 89 42 08 48 89 10 e8 e7 c5 42 00 4c 89 e0 5b 5d 41 5c c3 cc cc\\nRSP: 0018:ffffc900001bfd48 EFLAGS: 00000002\\nRAX: 0000000000000000 RBX: ffff8880088f5ae8 RCX: 00000000361289f9\\nRDX: 0000000000000000 RSI: 0000000000000206 RDI: ffff8880088f5b00\\nRBP: ffff8880088f5b00 R08: 0000000000080000 R09: 0000000000000001\\nR10: 0000000000000003 R11: 0000000000000001 R12: ffff8880056b6a00\\nR13: ffff8880088f5280 R14: 0000000000000001 R15: ffff8880088f5a80\\nFS: 0000000000000000(0000) GS:ffff88807dd80000(0000) knlGS:0000000000000000\\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 0000000000000008 CR3: 0000000006314000 CR4: 00000000007506f0\\nPKRU: 55555554\\nCall Trace:\\n \u003cTASK\u003e\\n unix_release_sock (net/unix/af_unix.c:654)\\n unix_release (net/unix/af_unix.c:1050)\\n __sock_release (net/socket.c:660)\\n sock_close (net/socket.c:1423)\\n __fput (fs/file_table.c:423)\\n delayed_fput (fs/file_table.c:444 (discriminator 3))\\n process_one_work (kernel/workqueue.c:3259)\\n worker_thread (kernel/workqueue.c:3329 kernel/workqueue.c:3416)\\n kthread (kernel/kthread.c:388)\\n ret_from_fork (arch/x86/kernel/process.c:153)\\n ret_from_fork_asm (arch/x86/entry/entry_64.S:257)\\n \u003c/TASK\u003e\\nModules linked in:\\nCR2: 0000000000000008\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: af_unix: actualice unix_sk(sk)-\u0026gt;oob_skb bajo el bloqueo sk_receive_queue. Billy Jheng Bing-Jhong inform\u00f3 de una ejecuci\u00f3n entre __unix_gc() y queue_oob(). __unix_gc() intenta recolectar basura de sockets en vuelo close()d, y luego, si el socket tiene MSG_OOB en unix_sk(sk)-\u0026gt;oob_skb, GC eliminar\u00e1 la referencia y establecer\u00e1 NULL sin bloqueo. Sin embargo, el socket del par a\u00fan puede enviar el mensaje MSG_OOB y queue_oob() puede actualizar unix_sk(sk)-\u0026gt;oob_skb simult\u00e1neamente, lo que lleva a la desreferencia del puntero NULL. [0] Para solucionar el problema, actualicemos unix_sk(sk)-\u0026gt;oob_skb bajo el bloqueo de sk_receive_queue y lo llevemos a todos los lugares donde toquemos oob_skb. Tenga en cuenta que posponemos kfree_skb() en Manage_oob() para silenciar el falso positivo de Lockdep (consulte [1]). [0]: ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 0000000000000008 PF: acceso de escritura del supervisor en modo kernel PF: error_code(0x0002) - p\u00e1gina no presente PGD 8000000009f5e067 P4D 8000000009f5e067 PUD 9f5d067 PMD 0 Ups: 02 [#1] SMP ADELANTADO PTI CPU: 3 PID: 50 Comm: kworker/3:1 No contaminado 6.9.0-rc5-00191-gd091e579b864 #110 Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0- gd239552ce722-prebuilt.qemu.org 01/04/2014 Cola de trabajo: eventos retrasados_fput RIP: 0010:skb_dequeue (./include/linux/skbuff.h:2386 ./include/linux/skbuff.h:2402 net/core/skbuff. c:3847) C\u00f3digo: 39 e3 74 3e 8b 43 10 48 89 ef 83 e8 01 89 43 10 49 8b 44 24 08 49 c7 44 24 08 00 00 00 00 49 8b 14 24 49 c7 04 24 00 0 00 00 \u0026lt;48 \u0026gt; 89 42 08 48 89 10 e8 e7 c5 42 00 4c 89 e0 5b 5d 41 5c c3 cc cc RSP: 0018:ffffc900001bfd48 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 80088f5ae8 RCX: 00000000361289f9 RDX: 0000000000000000 RSI: 0000000000000206 RDI: ffff8880088f5b00 RBP: ffff8880088f5b00 R08: 0000000000080000 R09: 0000000000000001 R10: 0000000000000003 R11: 00000000000000001 R12: ffff8880056b6a00 R13: ffff8880088f5280 R14: 0000000000000001 R15: ffff8880088f5a80 FS: 0000000000000000(0000) GS:ffff88807dd80000(0000) knlGS:00000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0 : 0000000080050033 CR2: 0000000000000008 CR3: 0000000006314000 CR4: 00000000007506f0 PKRU: 55555554 Seguimiento de llamadas: unix_release_sock (net/unix/af_unix.c:654) ix_release (net/unix/af_unix.c:1050) __sock_release (net/socket. c:660) sock_close (net/socket.c:1423) __fput (fs/file_table.c:423) retrasado_fput (fs/file_table.c:444 (discriminador 3)) Process_one_work (kernel/workqueue.c:3259) trabajador_thread ( kernel/workqueue.c:3329 kernel/workqueue.c:3416) kthread (kernel/kthread.c:388) ret_from_fork (arch/x86/kernel/process.c:153) ret_from_fork_asm (arch/x86/entry/entry_64.S :257) M\u00f3dulos vinculados en: CR2: 0000000000000008\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.6,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4708f49add84a57ce0ccc7bf9a6269845c631cc3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4bf6964451c3cb411fbaa1ae8b214b3d97a59bf1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/518a994aa0b87d96f1bc6678a7035df5d1fcd7a1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9841991a446c87f90f66f4b9fee6fe934c1336a2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d59ae9314b97e01c76a4171472441e55721ba636\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4708f49add84a57ce0ccc7bf9a6269845c631cc3\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/4bf6964451c3cb411fbaa1ae8b214b3d97a59bf1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/518a994aa0b87d96f1bc6678a7035df5d1fcd7a1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/9841991a446c87f90f66f4b9fee6fe934c1336a2\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/d59ae9314b97e01c76a4171472441e55721ba636\",\"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.