CVE-2024-53216— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于smb模块中在重新连接时未正确处理cfid，导致内存泄漏。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 9ceddd9da13434a5906255c0fc528c385aded283< bd8524148dd8c123334b066faa90590ba2ef8e6f |
affected |
9ceddd9da13434a5906255c0fc528c385aded283< 2e4854599200f4d021df8ae17e69221d7c149f3e |
affected | ||
9ceddd9da13434a5906255c0fc528c385aded283< ad4363a24a5746b257c0beb5d8cc68f9b62c173f |
affected | ||
9ceddd9da13434a5906255c0fc528c385aded283< f8c989a0c89a75d30f899a7cabdc14d72522bb8d |
affected | ||
4.20 |
affected | ||
< 4.20 |
unaffected | ||
6.6.64≤ 6.6.* |
unaffected | ||
6.11.11≤ 6.11.* |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2024-53216 基础信息
漏洞信息
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Vulnerability Title
nfsd: release svc_expkey/svc_export with rcu_work
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
nfsd: release svc_expkey/svc_export with rcu_work
The last reference for `cache_head` can be reduced to zero in `c_show`
and `e_show`(using `rcu_read_lock` and `rcu_read_unlock`). Consequently,
`svc_export_put` and `expkey_put` will be invoked, leading to two
issues:
1. The `svc_export_put` will directly free ex_uuid. However,
`e_show`/`c_show` will access `ex_uuid` after `cache_put`, which can
trigger a use-after-free issue, shown below.
==================================================================
BUG: KASAN: slab-use-after-free in svc_export_show+0x362/0x430 [nfsd]
Read of size 1 at addr ff11000010fdc120 by task cat/870
CPU: 1 UID: 0 PID: 870 Comm: cat Not tainted 6.12.0-rc3+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.1-2.fc37 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x53/0x70
print_address_description.constprop.0+0x2c/0x3a0
print_report+0xb9/0x280
kasan_report+0xae/0xe0
svc_export_show+0x362/0x430 [nfsd]
c_show+0x161/0x390 [sunrpc]
seq_read_iter+0x589/0x770
seq_read+0x1e5/0x270
proc_reg_read+0xe1/0x140
vfs_read+0x125/0x530
ksys_read+0xc1/0x160
do_syscall_64+0x5f/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Allocated by task 830:
kasan_save_stack+0x20/0x40
kasan_save_track+0x14/0x30
__kasan_kmalloc+0x8f/0xa0
__kmalloc_node_track_caller_noprof+0x1bc/0x400
kmemdup_noprof+0x22/0x50
svc_export_parse+0x8a9/0xb80 [nfsd]
cache_do_downcall+0x71/0xa0 [sunrpc]
cache_write_procfs+0x8e/0xd0 [sunrpc]
proc_reg_write+0xe1/0x140
vfs_write+0x1a5/0x6d0
ksys_write+0xc1/0x160
do_syscall_64+0x5f/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e
Freed by task 868:
kasan_save_stack+0x20/0x40
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3b/0x60
__kasan_slab_free+0x37/0x50
kfree+0xf3/0x3e0
svc_export_put+0x87/0xb0 [nfsd]
cache_purge+0x17f/0x1f0 [sunrpc]
nfsd_destroy_serv+0x226/0x2d0 [nfsd]
nfsd_svc+0x125/0x1e0 [nfsd]
write_threads+0x16a/0x2a0 [nfsd]
nfsctl_transaction_write+0x74/0xa0 [nfsd]
vfs_write+0x1a5/0x6d0
ksys_write+0xc1/0x160
do_syscall_64+0x5f/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e
2. We cannot sleep while using `rcu_read_lock`/`rcu_read_unlock`.
However, `svc_export_put`/`expkey_put` will call path_put, which
subsequently triggers a sleeping operation due to the following
`dput`.
=============================
WARNING: suspicious RCU usage
5.10.0-dirty #141 Not tainted
-----------------------------
...
Call Trace:
dump_stack+0x9a/0xd0
___might_sleep+0x231/0x240
dput+0x39/0x600
path_put+0x1b/0x30
svc_export_put+0x17/0x80
e_show+0x1c9/0x200
seq_read_iter+0x63f/0x7c0
seq_read+0x226/0x2d0
vfs_read+0x113/0x2c0
ksys_read+0xc9/0x170
do_syscall_64+0x33/0x40
entry_SYSCALL_64_after_hwframe+0x67/0xd1
Fix these issues by using `rcu_work` to help release
`svc_expkey`/`svc_export`. This approach allows for an asynchronous
context to invoke `path_put` and also facilitates the freeing of
`uuid/exp/key` after an RCU grace period.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于smb模块中在重新连接时未正确处理cfid，导致内存泄漏。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2024-53216 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2024-53216 补丁与修复 (4)
同批安全公告 · Linux · 2024-12-27 · 共 221 条
| CVE-2024-56645 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53209 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53169 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53206 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-56640 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-56656 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53186 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53176 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53177 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-53179 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2024-56591 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56651 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56653 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-53224 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-53237 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56626 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56669 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56627 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56605 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-56531 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 221 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2024-53216
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