CVE-2023-52474— 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。攻击者利用该漏洞导致数据损坏。
可能的 ATT&CK 技术 1 AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 14
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 7724105686e718ac476a6ad3304fea2fbcfcffde< 9c4c6512d7330b743c4ffd18bd999a86ca26db0d |
affected |
7724105686e718ac476a6ad3304fea2fbcfcffde< a2bd706ab63509793b5cd5065e685b7ef5cba678 |
affected | ||
7724105686e718ac476a6ad3304fea2fbcfcffde< dce59b5443700fbd0d2433ec6e4d4cf063448844 |
affected | ||
7724105686e718ac476a6ad3304fea2fbcfcffde< c76cb8f4bdf26d04cfa5485a93ce297dba5e6a80 |
affected | ||
7724105686e718ac476a6ad3304fea2fbcfcffde< 7e6010f79b58f45b204cf18aa58f4b73c3f30adc |
affected | ||
7724105686e718ac476a6ad3304fea2fbcfcffde< 00cbce5cbf88459cd1aa1d60d0f1df15477df127 |
affected | ||
4.3 |
affected | ||
< 4.3 |
unaffected | ||
| … +6 条更多 | |||
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一、 漏洞 CVE-2023-52474 基础信息
漏洞信息
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Vulnerability Title
IB/hfi1: Fix bugs with non-PAGE_SIZE-end multi-iovec user SDMA requests
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
IB/hfi1: Fix bugs with non-PAGE_SIZE-end multi-iovec user SDMA requests
hfi1 user SDMA request processing has two bugs that can cause data
corruption for user SDMA requests that have multiple payload iovecs
where an iovec other than the tail iovec does not run up to the page
boundary for the buffer pointed to by that iovec.a
Here are the specific bugs:
1. user_sdma_txadd() does not use struct user_sdma_iovec->iov.iov_len.
Rather, user_sdma_txadd() will add up to PAGE_SIZE bytes from iovec
to the packet, even if some of those bytes are past
iovec->iov.iov_len and are thus not intended to be in the packet.
2. user_sdma_txadd() and user_sdma_send_pkts() fail to advance to the
next iovec in user_sdma_request->iovs when the current iovec
is not PAGE_SIZE and does not contain enough data to complete the
packet. The transmitted packet will contain the wrong data from the
iovec pages.
This has not been an issue with SDMA packets from hfi1 Verbs or PSM2
because they only produce iovecs that end short of PAGE_SIZE as the tail
iovec of an SDMA request.
Fixing these bugs exposes other bugs with the SDMA pin cache
(struct mmu_rb_handler) that get in way of supporting user SDMA requests
with multiple payload iovecs whose buffers do not end at PAGE_SIZE. So
this commit fixes those issues as well.
Here are the mmu_rb_handler bugs that non-PAGE_SIZE-end multi-iovec
payload user SDMA requests can hit:
1. Overlapping memory ranges in mmu_rb_handler will result in duplicate
pinnings.
2. When extending an existing mmu_rb_handler entry (struct mmu_rb_node),
the mmu_rb code (1) removes the existing entry under a lock, (2)
releases that lock, pins the new pages, (3) then reacquires the lock
to insert the extended mmu_rb_node.
If someone else comes in and inserts an overlapping entry between (2)
and (3), insert in (3) will fail.
The failure path code in this case unpins _all_ pages in either the
original mmu_rb_node or the new mmu_rb_node that was inserted between
(2) and (3).
3. In hfi1_mmu_rb_remove_unless_exact(), mmu_rb_node->refcount is
incremented outside of mmu_rb_handler->lock. As a result, mmu_rb_node
could be evicted by another thread that gets mmu_rb_handler->lock and
checks mmu_rb_node->refcount before mmu_rb_node->refcount is
incremented.
4. Related to #2 above, SDMA request submission failure path does not
check mmu_rb_node->refcount before freeing mmu_rb_node object.
If there are other SDMA requests in progress whose iovecs have
pointers to the now-freed mmu_rb_node(s), those pointers to the
now-freed mmu_rb nodes will be dereferenced when those SDMA requests
complete.
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。攻击者利用该漏洞导致数据损坏。
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-2023-52474 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2023-52474 其他参考 (6)
同批安全公告 · Linux · 2024-02-26 · 共 6 条
| CVE-2019-25160 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2019-25162 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2024-26606 | Linux kernel 安全漏洞 | |
| CVE-2020-36775 | Linux kernel 安全漏洞 | |
| CVE-2021-46906 | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2023-52474
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