cnvd - cnvd-2023-54416

cnvd-2023-54416

Vulnerability from cnvd

Title: Linux kernel信息泄露漏洞（CNVD-2023-54416）

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存在信息泄露漏洞，该漏洞源于timens_install调用current_is_single_threaded来判断当前进程是否是单线程的，但是这个调用未能考虑io_uring的io_worker线程，攻击者可利用该漏洞将内核内存信息泄露给用户进程。

Severity: 中

Patch Name: Linux kernel信息泄露漏洞（CNVD-2023-54416）的补丁

Patch 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存在信息泄露漏洞，该漏洞源于timens_install调用current_is_single_threaded来判断当前进程是否是单线程的，但是这个调用未能考虑io_uring的io_worker线程，攻击者可利用该漏洞将内核内存信息泄露给用户进程。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description:

厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93

Reference: https://nvd.nist.gov/vuln/detail/CVE-2023-23586

Impacted products

Name
Linux Linux kernel >=5.6，<5.10.161

Show details on source website

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2023-23586",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2023-23586"
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  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8etimens_install\u8c03\u7528current_is_single_threaded\u6765\u5224\u65ad\u5f53\u524d\u8fdb\u7a0b\u662f\u5426\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u4f46\u662f\u8fd9\u4e2a\u8c03\u7528\u672a\u80fd\u8003\u8651io_uring\u7684io_worker\u7ebf\u7a0b\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u5185\u6838\u5185\u5b58\u4fe1\u606f\u6cc4\u9732\u7ed9\u7528\u6237\u8fdb\u7a0b\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2023-54416",
  "openTime": "2023-07-06",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8etimens_install\u8c03\u7528current_is_single_threaded\u6765\u5224\u65ad\u5f53\u524d\u8fdb\u7a0b\u662f\u5426\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u4f46\u662f\u8fd9\u4e2a\u8c03\u7528\u672a\u80fd\u8003\u8651io_uring\u7684io_worker\u7ebf\u7a0b\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u5185\u6838\u5185\u5b58\u4fe1\u606f\u6cc4\u9732\u7ed9\u7528\u6237\u8fdb\u7a0b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2023-54416\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003e=5.6\uff0c\u003c5.10.161"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2023-23586",
  "serverity": "\u4e2d",
  "submitTime": "2023-02-21",
  "title": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2023-54416\uff09"
}

CVE-2023-23586 (GCVE-0-2023-23586)

Vulnerability from cvelistv5

Published

2023-02-17 12:25

Modified

2025-03-12 20:08

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE

CWE-416 - Use After Free

Summary

Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process. timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93
	https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93

Impacted products

	Vendor	Product	Version
	Linux	Linux Kernel	Version: 5.6 <

Show details on NVD website

JSON

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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.

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