Vulnerability-Lookup

CNVD-2020-36277

Vulnerability from cnvd - Published: 2020-07-06

Title

OpenSSH输入验证错误漏洞

Description

OpenSSH（OpenBSD Secure Shell）是OpenBSD计划组的一套用于安全访问远程计算机的连接工具。该工具是SSH协议的开源实现，支持对所有的传输进行加密，可有效阻止窃听、连接劫持以及其他网络级的攻击。 OpenSSH 8.2版本中存在输入验证错误漏洞，攻击者可通过在远程服务器上创建子目录利用该漏洞覆盖客户端下载目录中的任意文件。

Severity

中

Patch Name

OpenSSH输入验证错误漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.openssh.com/txt/release-8.3

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-12062

Impacted products

Name
Openbsd OpenSSH 8.2

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-12062"
    }
  },
  "description": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002\n\nOpenSSH 8.2\u7248\u672c\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5728\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\u521b\u5efa\u5b50\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u8986\u76d6\u5ba2\u6237\u7aef\u4e0b\u8f7d\u76ee\u5f55\u4e2d\u7684\u4efb\u610f\u6587\u4ef6\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://www.openssh.com/txt/release-8.3",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-36277",
  "openTime": "2020-07-06",
  "patchDescription": "OpenSSH\uff08OpenBSD Secure Shell\uff09\u662fOpenBSD\u8ba1\u5212\u7ec4\u7684\u4e00\u5957\u7528\u4e8e\u5b89\u5168\u8bbf\u95ee\u8fdc\u7a0b\u8ba1\u7b97\u673a\u7684\u8fde\u63a5\u5de5\u5177\u3002\u8be5\u5de5\u5177\u662fSSH\u534f\u8bae\u7684\u5f00\u6e90\u5b9e\u73b0\uff0c\u652f\u6301\u5bf9\u6240\u6709\u7684\u4f20\u8f93\u8fdb\u884c\u52a0\u5bc6\uff0c\u53ef\u6709\u6548\u963b\u6b62\u7a83\u542c\u3001\u8fde\u63a5\u52ab\u6301\u4ee5\u53ca\u5176\u4ed6\u7f51\u7edc\u7ea7\u7684\u653b\u51fb\u3002\r\n\r\nOpenSSH 8.2\u7248\u672c\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5728\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\u521b\u5efa\u5b50\u76ee\u5f55\u5229\u7528\u8be5\u6f0f\u6d1e\u8986\u76d6\u5ba2\u6237\u7aef\u4e0b\u8f7d\u76ee\u5f55\u4e2d\u7684\u4efb\u610f\u6587\u4ef6\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": "OpenSSH\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Openbsd OpenSSH 8.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-12062",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-02",
  "title": "OpenSSH\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e"
}

CVE-2020-12062 (GCVE-0-2020-12062)

Vulnerability from cvelistv5 – Published: 2020-06-01 15:28 – Updated: 2024-08-04 11:48 Disputed

Summary

The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2020/…	x_refsource_MISC
https://www.openssh.com/txt/release-8.3	x_refsource_MISC
https://github.com/openssh/openssh-portable/commi…	x_refsource_MISC
https://github.com/openssh/openssh-portable/commi…	x_refsource_MISC

Date Public

2020-05-27 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:48:57.926Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2020/05/27/1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openssh.com/txt/release-8.3"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2020-05-27T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client\u0027s download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that \"this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol\" and \"utimes does not fail under normal circumstances."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-06-01T20:02:41.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2020/05/27/1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openssh.com/txt/release-8.3"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894"
        }
      ],
      "tags": [
        "disputed"
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-12062",
          "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": "** DISPUTED ** The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client\u0027s download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that \"this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol\" and \"utimes does not fail under normal circumstances.\""
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
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                  "value": "n/a"
                }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.openwall.com/lists/oss-security/2020/05/27/1",
              "refsource": "MISC",
              "url": "https://www.openwall.com/lists/oss-security/2020/05/27/1"
            },
            {
              "name": "https://www.openssh.com/txt/release-8.3",
              "refsource": "MISC",
              "url": "https://www.openssh.com/txt/release-8.3"
            },
            {
              "name": "https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1",
              "refsource": "MISC",
              "url": "https://github.com/openssh/openssh-portable/commit/955854cafca88e0cdcd3d09ca1ad4ada465364a1"
            },
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              "name": "https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894",
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              "url": "https://github.com/openssh/openssh-portable/commit/aad87b88fc2536b1ea023213729aaf4eaabe1894"
            }
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        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-12062",
    "datePublished": "2020-06-01T15:28:36.000Z",
    "dateReserved": "2020-04-22T00:00:00.000Z",
    "dateUpdated": "2024-08-04T11:48:57.926Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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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Action not permitted

CNVD-2020-36277

CVE-2020-12062 (GCVE-0-2020-12062)

Tags

Sightings

Nomenclature

Related by attack behaviour