Vulnerability-Lookup

CNVD-2023-72240

Vulnerability from cnvd - Published: 2023-09-26

Title

Linux kernel connection.c文件越界读取漏洞

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 6.3.8之前版本存在越界读取漏洞，该漏洞源于fs/smb/server/connection.c不会通过ksmbd_conn_handler_loop中的 pdu_size验证NetBIOS标头的长度字段和SMB标头大小之间的关系，攻击者可利用该漏洞导致越界读取。

Severity

高

Patch Name

Linux kernel connection.c文件越界读取漏洞的补丁

Patch Description

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/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0

Reference

https://nvd.nist.gov/vuln/detail/CVE-2023-38431

Impacted products

Name
Linux Linux kernel <6.3.8

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2023-38431",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2023-38431"
    }
  },
  "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 6.3.8\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8efs/smb/server/connection.c\u4e0d\u4f1a\u901a\u8fc7ksmbd_conn_handler_loop\u4e2d\u7684 pdu_size\u9a8c\u8bc1NetBIOS\u6807\u5934\u7684\u957f\u5ea6\u5b57\u6bb5\u548cSMB\u6807\u5934\u5927\u5c0f\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u8d8a\u754c\u8bfb\u53d6\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/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2023-72240",
  "openTime": "2023-09-26",
  "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 6.3.8\u4e4b\u524d\u7248\u672c\u5b58\u5728\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8efs/smb/server/connection.c\u4e0d\u4f1a\u901a\u8fc7ksmbd_conn_handler_loop\u4e2d\u7684 pdu_size\u9a8c\u8bc1NetBIOS\u6807\u5934\u7684\u957f\u5ea6\u5b57\u6bb5\u548cSMB\u6807\u5934\u5927\u5c0f\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u8d8a\u754c\u8bfb\u53d6\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 connection.c\u6587\u4ef6\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003c6.3.8"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2023-38431",
  "serverity": "\u9ad8",
  "submitTime": "2023-07-19",
  "title": "Linux kernel connection.c\u6587\u4ef6\u8d8a\u754c\u8bfb\u53d6\u6f0f\u6d1e"
}

CVE-2023-38431 (GCVE-0-2023-38431)

Vulnerability from cvelistv5 – Published: 2023-07-17 00:00 – Updated: 2024-08-02 17:39

Summary

An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://cdn.kernel.org/pub/linux/kernel/v6.x/Chan…
https://git.kernel.org/pub/scm/linux/kernel/git/t…
https://security.netapp.com/advisory/ntap-2023082…

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T17:39:13.538Z",
          "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/v6.x/ChangeLog-6.3.8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20230824-0011/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header\u0027s length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-08-24T18:06:20.296Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
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          "url": "https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8"
        },
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          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20230824-0011/"
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-38431",
    "datePublished": "2023-07-17T00:00:00.000Z",
    "dateReserved": "2023-07-17T00:00:00.000Z",
    "dateUpdated": "2024-08-02T17:39:13.538Z",
    "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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

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.