CVE-2023-52438— 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 binder 模块的 shinker 回调中存在释放后重用问题。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 16
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | dd2283f2605e3b3e9c61bcae844b34f2afa4813f< a53e15e592b4dcc91c3a3b8514e484a0bdbc53a3 |
affected |
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< c8c1158ffb007197f31f9d9170cf13e4f34cbb5c |
affected | ||
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< 8ad4d580e8aff8de2a4d57c5930fcc29f1ffd4a6 |
affected | ||
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< 9fa04c93f24138747807fe75b5591bb680098f56 |
affected | ||
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< a49087ab93508b60d9b8add91707a22dda832869 |
affected | ||
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< e074686e993ff1be5f21b085a3b1b4275ccd5727 |
affected | ||
dd2283f2605e3b3e9c61bcae844b34f2afa4813f< 3f489c2067c5824528212b0fc18b28d51332d906 |
affected | ||
4.20 |
affected | ||
| … +8 条更多 | |||
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一、 漏洞 CVE-2023-52438 基础信息
漏洞信息
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Vulnerability Title
binder: fix use-after-free in shinker's callback
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
binder: fix use-after-free in shinker's callback
The mmap read lock is used during the shrinker's callback, which means
that using alloc->vma pointer isn't safe as it can race with munmap().
As of commit dd2283f2605e ("mm: mmap: zap pages with read mmap_sem in
munmap") the mmap lock is downgraded after the vma has been isolated.
I was able to reproduce this issue by manually adding some delays and
triggering page reclaiming through the shrinker's debug sysfs. The
following KASAN report confirms the UAF:
==================================================================
BUG: KASAN: slab-use-after-free in zap_page_range_single+0x470/0x4b8
Read of size 8 at addr ffff356ed50e50f0 by task bash/478
CPU: 1 PID: 478 Comm: bash Not tainted 6.6.0-rc5-00055-g1c8b86a3799f-dirty #70
Hardware name: linux,dummy-virt (DT)
Call trace:
zap_page_range_single+0x470/0x4b8
binder_alloc_free_page+0x608/0xadc
__list_lru_walk_one+0x130/0x3b0
list_lru_walk_node+0xc4/0x22c
binder_shrink_scan+0x108/0x1dc
shrinker_debugfs_scan_write+0x2b4/0x500
full_proxy_write+0xd4/0x140
vfs_write+0x1ac/0x758
ksys_write+0xf0/0x1dc
__arm64_sys_write+0x6c/0x9c
Allocated by task 492:
kmem_cache_alloc+0x130/0x368
vm_area_alloc+0x2c/0x190
mmap_region+0x258/0x18bc
do_mmap+0x694/0xa60
vm_mmap_pgoff+0x170/0x29c
ksys_mmap_pgoff+0x290/0x3a0
__arm64_sys_mmap+0xcc/0x144
Freed by task 491:
kmem_cache_free+0x17c/0x3c8
vm_area_free_rcu_cb+0x74/0x98
rcu_core+0xa38/0x26d4
rcu_core_si+0x10/0x1c
__do_softirq+0x2fc/0xd24
Last potentially related work creation:
__call_rcu_common.constprop.0+0x6c/0xba0
call_rcu+0x10/0x1c
vm_area_free+0x18/0x24
remove_vma+0xe4/0x118
do_vmi_align_munmap.isra.0+0x718/0xb5c
do_vmi_munmap+0xdc/0x1fc
__vm_munmap+0x10c/0x278
__arm64_sys_munmap+0x58/0x7c
Fix this issue by performing instead a vma_lookup() which will fail to
find the vma that was isolated before the mmap lock downgrade. Note that
this option has better performance than upgrading to a mmap write lock
which would increase contention. Plus, mmap_write_trylock() has been
recently removed anyway.
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 binder 模块的 shinker 回调中存在释放后重用问题。
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-2023-52438 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2023-52438 邮件列表归档 (1)
CVE-2023-52438 其他参考 (7)
同批安全公告 · Linux · 2024-02-20 · 共 7 条
| CVE-2023-52434 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52433 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26581 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52436 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52439 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2023-52435 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2023-52438
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