cnvd - cnvd-2022-68369

CNVD-2022-68369

Vulnerability from cnvd - Published: 2022-10-10

Title

Linux Kernel任意内存读取漏洞

Description

Linux内核是一种开源的类Unix操作系统宏内核，用于高效地管理资源。 Linux Kernel中存在安全漏洞，用于填充传递给bpf_sys_bpf的结构中的指针的常量未经验证，可以指向任何地方，具有CAP_BPF的攻击者可以从系统的任何位置任意读取内存。攻击者可以利用该漏洞获取敏感信息。

Severity

中

Patch Name

Linux Kernel任意内存读取漏洞的补丁

Patch Description

Linux内核是一种开源的类Unix操作系统宏内核，用于高效地管理资源。 Linux Kernel中存在安全漏洞，用于填充传递给bpf_sys_bpf的结构中的指针的常量未经验证，可以指向任何地方，具有CAP_BPF的攻击者可以从系统的任何位置任意读取内存。攻击者可以利用该漏洞获取敏感信息。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

目前厂商已经发布了升级补丁以修复这个问题，请到厂商的主页下载： https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=86f44fcec22c

Reference

https://nvd.nist.gov/vuln/detail/CVE-2022-2785

Impacted products

Name
Linux Linux kernel <2022-08-10

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2022-2785",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2022-2785"
    }
  },
  "description": "Linux\u5185\u6838\u662f\u4e00\u79cd\u5f00\u6e90\u7684\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u5b8f\u5185\u6838\uff0c\u7528\u4e8e\u9ad8\u6548\u5730\u7ba1\u7406\u8d44\u6e90\u3002 \n\nLinux Kernel\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u7528\u4e8e\u586b\u5145\u4f20\u9012\u7ed9bpf_sys_bpf\u7684\u7ed3\u6784\u4e2d\u7684\u6307\u9488\u7684\u5e38\u91cf\u672a\u7ecf\u9a8c\u8bc1\uff0c\u53ef\u4ee5\u6307\u5411\u4efb\u4f55\u5730\u65b9\uff0c\u5177\u6709CAP_BPF\u7684\u653b\u51fb\u8005\u53ef\u4ee5\u4ece\u7cfb\u7edf\u7684\u4efb\u4f55\u4f4d\u7f6e\u4efb\u610f\u8bfb\u53d6\u5185\u5b58\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u654f\u611f\u4fe1\u606f\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=86f44fcec22c",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-68369",
  "openTime": "2022-10-10",
  "patchDescription": "Linux\u5185\u6838\u662f\u4e00\u79cd\u5f00\u6e90\u7684\u7c7bUnix\u64cd\u4f5c\u7cfb\u7edf\u5b8f\u5185\u6838\uff0c\u7528\u4e8e\u9ad8\u6548\u5730\u7ba1\u7406\u8d44\u6e90\u3002 \r\n\r\nLinux Kernel\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u7528\u4e8e\u586b\u5145\u4f20\u9012\u7ed9bpf_sys_bpf\u7684\u7ed3\u6784\u4e2d\u7684\u6307\u9488\u7684\u5e38\u91cf\u672a\u7ecf\u9a8c\u8bc1\uff0c\u53ef\u4ee5\u6307\u5411\u4efb\u4f55\u5730\u65b9\uff0c\u5177\u6709CAP_BPF\u7684\u653b\u51fb\u8005\u53ef\u4ee5\u4ece\u7cfb\u7edf\u7684\u4efb\u4f55\u4f4d\u7f6e\u4efb\u610f\u8bfb\u53d6\u5185\u5b58\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u654f\u611f\u4fe1\u606f\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\u4efb\u610f\u5185\u5b58\u8bfb\u53d6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c2022-08-10"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2022-2785",
  "serverity": "\u4e2d",
  "submitTime": "2022-09-26",
  "title": "Linux Kernel\u4efb\u610f\u5185\u5b58\u8bfb\u53d6\u6f0f\u6d1e"
}

CVE-2022-2785 (GCVE-0-2022-2785)

Vulnerability from cvelistv5 – Published: 2022-09-23 11:10 – Updated: 2025-04-21 13:49

Summary

There exists an arbitrary memory read within the Linux Kernel BPF - Constants provided to fill pointers in structs passed in to bpf_sys_bpf are not verified and can point anywhere, including memory not owned by BPF. An attacker with CAP_BPF can arbitrarily read memory from anywhere on the system. We recommend upgrading past commit 86f44fcec22c

Severity ?

6.7 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-125 - Out-of-bounds Read

Assigner

Google

References

URL

Tags

	https://git.kernel.org/bpf/bpf/c/86f44fcec22c	x_refsource_MISC
	https://lore.kernel.org/bpf/20220816205517.682470…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Linux Kernel	Kernel	Affected: 5.14 , < af2ac3e13e45 (custom) Affected: 5.18 , < b1d18a7574d0 (custom)

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2022-68369

CVE-2022-2785 (GCVE-0-2022-2785)

Tags

Sightings

Nomenclature