cnvd - cnvd-2021-20271

cnvd-2021-20271

Vulnerability from cnvd

Title: Linux kernel资源管理错误漏洞（CNVD-2021-20271）

Description:

Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。

Linux kernel中存在资源管理错误漏洞。该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。目前没有详细的漏洞细节提供。

Severity: 中

Formal description:

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法：

https://www.kernel.org/

Reference: https://access.redhat.com/security/cve/cve-2020-10781

Impacted products

Name
Linux Linux kernel <5.8-rc6

Show details on source website

JSON

To clipboard

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-10781"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u4e2d\u5b58\u5728\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7f51\u7edc\u7cfb\u7edf\u6216\u4ea7\u54c1\u5bf9\u7cfb\u7edf\u8d44\u6e90\uff08\u5982\u5185\u5b58\u3001\u78c1\u76d8\u7a7a\u95f4\u3001\u6587\u4ef6\u7b49\uff09\u7684\u7ba1\u7406\u4e0d\u5f53\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\n\r\nhttps://www.kernel.org/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-20271",
  "openTime": "2021-03-18",
  "products": {
    "product": "Linux Linux kernel \u003c5.8-rc6"
  },
  "referenceLink": "https://access.redhat.com/security/cve/cve-2020-10781",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-18",
  "title": "Linux kernel\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-20271\uff09"
}

CVE-2020-10781 (GCVE-0-2020-10781)

Vulnerability from cvelistv5

Published

2020-09-16 00:00

Modified

2024-08-04 11:14

Severity ?

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

CWE

CWE-732

Summary

A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable.

References

▼	URL	Tags
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
	https://www.openwall.com/lists/oss-security/2020/06/18/1
	https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html	mailing-list

Impacted products

	Vendor	Product	Version
	Linux Kernel	kernel	Version: before 5.8-rc6

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:14:15.582Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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          },
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            "tags": [
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            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781"
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            "tags": [
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            ],
            "url": "https://www.openwall.com/lists/oss-security/2020/06/18/1"
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          {
            "name": "[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update",
            "tags": [
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              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html"
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        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "product": "kernel",
          "vendor": "Linux Kernel",
          "versions": [
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              "status": "affected",
              "version": "before 5.8-rc6"
            }
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          "value": "A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable."
        }
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            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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      "providerMetadata": {
        "dateUpdated": "2022-10-07T00:00:00",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
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          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680"
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    "dateReserved": "2020-03-20T00:00:00",
    "dateUpdated": "2024-08-04T11:14:15.582Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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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