Vulnerability-Lookup

CNVD-2021-60550

Vulnerability from cnvd - Published: 2021-08-10

Title

Zscaler Client Connector缓冲区溢出漏洞

Description

Zscaler Client Connector是zscaler的一个应用软件。一种安装在设备上的应用程序，可确保互联网流量和对组织内部应用程序的访问是安全的并符合组织的政策，即使不在公司网络时。 Zscaler Client Connector 2.1.2.74 之前的适用于Windows的版本存在安全漏洞，该漏洞源于客户端连接器在连接到错误配置的 TLS 服务器时存在基于堆栈的缓冲区溢出。攻击者可能能够以系统权限执行任意代码。

Severity

高

Patch Name

Zscaler Client Connector缓冲区溢出漏洞的补丁

Patch Description

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://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows&applicable_version=2.1.2.81

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-11633

Impacted products

Name
zscaler Client Connector <2.1.2.74

Show details on source website

JSON

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    "cve": {
      "cveNumber": "CVE-2020-11633"
    }
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  "description": "Zscaler Client Connector\u662fzscaler\u7684\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u4e00\u79cd\u5b89\u88c5\u5728\u8bbe\u5907\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u786e\u4fdd\u4e92\u8054\u7f51\u6d41\u91cf\u548c\u5bf9\u7ec4\u7ec7\u5185\u90e8\u5e94\u7528\u7a0b\u5e8f\u7684\u8bbf\u95ee\u662f\u5b89\u5168\u7684\u5e76\u7b26\u5408\u7ec4\u7ec7\u7684\u653f\u7b56\uff0c\u5373\u4f7f\u4e0d\u5728\u516c\u53f8\u7f51\u7edc\u65f6\u3002\n\nZscaler Client Connector 2.1.2.74 \u4e4b\u524d\u7684\u9002\u7528\u4e8eWindows\u7684\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5ba2\u6237\u7aef\u8fde\u63a5\u5668\u5728\u8fde\u63a5\u5230\u9519\u8bef\u914d\u7f6e\u7684 TLS \u670d\u52a1\u5668\u65f6\u5b58\u5728\u57fa\u4e8e\u5806\u6808\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\u3002\u653b\u51fb\u8005\u53ef\u80fd\u80fd\u591f\u4ee5\u7cfb\u7edf\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-60550",
  "openTime": "2021-08-10",
  "patchDescription": "Zscaler Client Connector\u662fzscaler\u7684\u4e00\u4e2a\u5e94\u7528\u8f6f\u4ef6\u3002\u4e00\u79cd\u5b89\u88c5\u5728\u8bbe\u5907\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u53ef\u786e\u4fdd\u4e92\u8054\u7f51\u6d41\u91cf\u548c\u5bf9\u7ec4\u7ec7\u5185\u90e8\u5e94\u7528\u7a0b\u5e8f\u7684\u8bbf\u95ee\u662f\u5b89\u5168\u7684\u5e76\u7b26\u5408\u7ec4\u7ec7\u7684\u653f\u7b56\uff0c\u5373\u4f7f\u4e0d\u5728\u516c\u53f8\u7f51\u7edc\u65f6\u3002\r\n\r\nZscaler Client Connector 2.1.2.74 \u4e4b\u524d\u7684\u9002\u7528\u4e8eWindows\u7684\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5ba2\u6237\u7aef\u8fde\u63a5\u5668\u5728\u8fde\u63a5\u5230\u9519\u8bef\u914d\u7f6e\u7684 TLS \u670d\u52a1\u5668\u65f6\u5b58\u5728\u57fa\u4e8e\u5806\u6808\u7684\u7f13\u51b2\u533a\u6ea2\u51fa\u3002\u653b\u51fb\u8005\u53ef\u80fd\u80fd\u591f\u4ee5\u7cfb\u7edf\u6743\u9650\u6267\u884c\u4efb\u610f\u4ee3\u7801\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": "Zscaler Client Connector\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "zscaler Client Connector \u003c2.1.2.74"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-11633",
  "serverity": "\u9ad8",
  "submitTime": "2021-07-16",
  "title": "Zscaler Client Connector\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2020-11633 (GCVE-0-2020-11633)

Vulnerability from cvelistv5 – Published: 2021-07-15 17:01 – Updated: 2024-08-04 11:35

Summary

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges.

Severity

No CVSS data available.

CWE

Assigner

Zscaler CNA under the mitre root

CNA scorecard C 68/100 over 10 records in the last 180 days details

References

1 reference

URL	Tags
https://help.zscaler.com/zscaler-client-connector…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T11:35:13.575Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows\u0026applicable_version=2.1.2.81"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-15T17:01:12.000Z",
        "orgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
        "shortName": "Zscaler"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows\u0026applicable_version=2.1.2.81"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@zscaler.com",
          "ID": "CVE-2020-11633",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
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        },
        "data_format": "MITRE",
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        "data_version": "4.0",
        "description": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
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        },
        "references": {
          "reference_data": [
            {
              "name": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows\u0026applicable_version=2.1.2.81",
              "refsource": "MISC",
              "url": "https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows\u0026applicable_version=2.1.2.81"
            }
          ]
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "73c6f63b-efac-410d-a0a9-569700f85a04",
    "assignerShortName": "Zscaler",
    "cveId": "CVE-2020-11633",
    "datePublished": "2021-07-15T17:01:13.000Z",
    "dateReserved": "2020-04-08T00:00:00.000Z",
    "dateUpdated": "2024-08-04T11:35:13.575Z",
    "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.

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.

Action not permitted

CNVD-2021-60550

CVE-2020-11633 (GCVE-0-2020-11633)

Tags

Sightings

Nomenclature

Related by attack behaviour