Vulnerability-Lookup

CNVD-2021-102393

Vulnerability from cnvd - Published: 2021-12-24

Title

Linux kernel信息泄露漏洞（CNVD-2021-102393）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。KVM是其中的一个基于内核的虚拟机。overlayfs是其中的一套文件系统。 Linux kernel存在安全漏洞，该漏洞源于从5.15.8开始，Linux内核中net/phonet/pep.c 中的 pep_sock_accept存在引用计数泄漏。目前没有详细的漏洞细节提供。

Severity

低

Patch Name

Linux kernel信息泄露漏洞（CNVD-2021-102393）的补丁

Patch Description

Formal description

目前厂商已发布升级补丁以修复漏洞，详情请关注厂商主页： https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-45095

Impacted products

Name
Linux kernel <=5.15.8

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-45095"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002overlayfs\u662f\u5176\u4e2d\u7684\u4e00\u5957\u6587\u4ef6\u7cfb\u7edf\u3002\n\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ece5.15.8\u5f00\u59cb\uff0cLinux\u5185\u6838\u4e2dnet/phonet/pep.c \u4e2d\u7684 pep_sock_accept\u5b58\u5728\u5f15\u7528\u8ba1\u6570\u6cc4\u6f0f\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8be6\u60c5\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\uff1a\r\nhttps://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-102393",
  "openTime": "2021-12-24",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002KVM\u662f\u5176\u4e2d\u7684\u4e00\u4e2a\u57fa\u4e8e\u5185\u6838\u7684\u865a\u62df\u673a\u3002overlayfs\u662f\u5176\u4e2d\u7684\u4e00\u5957\u6587\u4ef6\u7cfb\u7edf\u3002\r\n\r\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ece5.15.8\u5f00\u59cb\uff0cLinux\u5185\u6838\u4e2dnet/phonet/pep.c \u4e2d\u7684 pep_sock_accept\u5b58\u5728\u5f15\u7528\u8ba1\u6570\u6cc4\u6f0f\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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-2021-102393\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux kernel \u003c=5.15.8"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-45095",
  "serverity": "\u4f4e",
  "submitTime": "2021-12-17",
  "title": "Linux kernel\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff08CNVD-2021-102393\uff09"
}

CVE-2021-45095 (GCVE-0-2021-45095)

Vulnerability from cvelistv5 – Published: 2021-12-16 03:37 – Updated: 2024-08-04 04:32

Summary

pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root Scorecard

References

6 references

URL	Tags
https://git.kernel.org/pub/scm/linux/kernel/git/n…	x_refsource_MISC
https://github.com/torvalds/linux/commit/bcd0f933…	x_refsource_MISC
https://www.debian.org/security/2022/dsa-5050	vendor-advisoryx_refsource_DEBIAN
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST
https://www.debian.org/security/2022/dsa-5096	vendor-advisoryx_refsource_DEBIAN

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:32:13.715Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0"
          },
          {
            "name": "DSA-5050",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5050"
          },
          {
            "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html"
          },
          {
            "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"
          },
          {
            "name": "DSA-5096",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5096"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2022-03-10T02:06:29.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0"
        },
        {
          "name": "DSA-5050",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5050"
        },
        {
          "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html"
        },
        {
          "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"
        },
        {
          "name": "DSA-5096",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5096"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-45095",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0",
              "refsource": "MISC",
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0",
              "refsource": "MISC",
              "url": "https://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0"
            },
            {
              "name": "DSA-5050",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5050"
            },
            {
              "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html"
            },
            {
              "name": "[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update",
              "refsource": "MLIST",
              "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html"
            },
            {
              "name": "DSA-5096",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5096"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-45095",
    "datePublished": "2021-12-16T03:37:50.000Z",
    "dateReserved": "2021-12-16T00:00:00.000Z",
    "dateUpdated": "2024-08-04T04:32:13.715Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CNVD-2021-102393

CVE-2021-45095 (GCVE-0-2021-45095)

Tags

Sightings

Nomenclature

Related by attack behaviour