cnvd - cnvd-2023-48540

cnvd-2023-48540

Vulnerability from cnvd

Title: Linux kernel资源管理错误漏洞（CNVD-2023-48540）

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存在资源管理错误漏洞，该漏洞源于在并发iptables规则替换期间每个CPU序列计数被错误处理，导致在数据包处理上下文中可能存在释放后重用。攻击者可利用该漏洞造成拒绝服务。

Severity: 高

Patch Name: Linux kernel资源管理错误漏洞（CNVD-2023-48540）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存在资源管理错误漏洞，该漏洞源于在并发iptables规则替换期间每个CPU序列计数被错误处理，导致在数据包处理上下文中可能存在释放后重用。攻击者可利用该漏洞造成拒绝服务。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:

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c

Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-36694

Impacted products

Name
Linux Linux kernel <5.10

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-36694",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-36694"
    }
  },
  "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\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u5e76\u53d1iptables\u89c4\u5219\u66ff\u6362\u671f\u95f4\u6bcf\u4e2aCPU\u5e8f\u5217\u8ba1\u6570\u88ab\u9519\u8bef\u5904\u7406\uff0c\u5bfc\u81f4\u5728\u6570\u636e\u5305\u5904\u7406\u4e0a\u4e0b\u6587\u4e2d\u53ef\u80fd\u5b58\u5728\u91ca\u653e\u540e\u91cd\u7528\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a \r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2023-48540",
  "openTime": "2023-06-16",
  "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\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728\u5e76\u53d1iptables\u89c4\u5219\u66ff\u6362\u671f\u95f4\u6bcf\u4e2aCPU\u5e8f\u5217\u8ba1\u6570\u88ab\u9519\u8bef\u5904\u7406\uff0c\u5bfc\u81f4\u5728\u6570\u636e\u5305\u5904\u7406\u4e0a\u4e0b\u6587\u4e2d\u53ef\u80fd\u5b58\u5728\u91ca\u653e\u540e\u91cd\u7528\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\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\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2023-48540\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c5.10"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-36694",
  "serverity": "\u9ad8",
  "submitTime": "2023-05-30",
  "title": "Linux kernel\u8d44\u6e90\u7ba1\u7406\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2023-48540\uff09"
}

CVE-2020-36694 (GCVE-0-2020-36694)

Vulnerability from cvelistv5

Published

2023-05-21 00:00

Modified

2025-01-31 17:46

Severity ?

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

CWE

Summary

An issue was discovered in netfilter in the Linux kernel before 5.10. There can be a use-after-free in the packet processing context, because the per-CPU sequence count is mishandled during concurrent iptables rules replacement. This could be exploited with the CAP_NET_ADMIN capability in an unprivileged namespace. NOTE: cc00bca was reverted in 5.12.

References

▼	URL	Tags
	https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c
	https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2
	https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12
	https://security.netapp.com/advisory/ntap-20230622-0005/

Impacted products

	Vendor	Product	Version
	n/a	n/a	Version: n/a

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T17:37:05.278Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
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            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10"
          },
          {
            "tags": [
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            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cc00bcaa589914096edef7fb87ca5cee4a166b5c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://syzkaller.appspot.com/bug?id=0c4fd9c6aa04ec116d01e915d3b186f71a212cb2"
          },
          {
            "tags": [
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            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20230622-0005/"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 6.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "HIGH",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-36694",
                "options": [
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                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-21T16:55:47.773290Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-01-31T17:46:04.151Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "vendor": "n/a",
          "versions": [
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      "descriptions": [
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        }
      ],
      "problemTypes": [
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        },
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          "url": "https://security.netapp.com/advisory/ntap-20230622-0005/"
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "datePublished": "2023-05-21T00:00:00.000Z",
    "dateReserved": "2023-05-21T00:00:00.000Z",
    "dateUpdated": "2025-01-31T17:46:04.151Z",
    "state": "PUBLISHED"
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  "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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