Vulnerability-Lookup

CNVD-2020-51556

Vulnerability from cnvd - Published: 2020-09-11

Title

Citrix Systems XenApp信息泄露漏洞

Description

Citrix Systems XenApp是美国思杰系统（Citrix Systems）公司的一套应用程序虚拟化软件。该软件支持应用程序从集中位置发布并流式传输到隔离的环境中，并在目标设备上执行这些应用程序 Citrix Systems XenApp 6.5版本中存在信息泄露漏洞，该漏洞源于仅在输入有效的用户名后才会出现2FA错误页面，远程攻击者可利用该漏洞导致信息泄露。

Severity

中

Formal description

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://www.citrix.com/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-13998

Impacted products

Name
Citrix Systems XenApp 6.5

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-13998"
    }
  },
  "description": "Citrix Systems XenApp\u662f\u7f8e\u56fd\u601d\u6770\u7cfb\u7edf\uff08Citrix Systems\uff09\u516c\u53f8\u7684\u4e00\u5957\u5e94\u7528\u7a0b\u5e8f\u865a\u62df\u5316\u8f6f\u4ef6\u3002\u8be5\u8f6f\u4ef6\u652f\u6301\u5e94\u7528\u7a0b\u5e8f\u4ece\u96c6\u4e2d\u4f4d\u7f6e\u53d1\u5e03\u5e76\u6d41\u5f0f\u4f20\u8f93\u5230\u9694\u79bb\u7684\u73af\u5883\u4e2d\uff0c\u5e76\u5728\u76ee\u6807\u8bbe\u5907\u4e0a\u6267\u884c\u8fd9\u4e9b\u5e94\u7528\u7a0b\u5e8f\n\nCitrix Systems XenApp 6.5\u7248\u672c\u4e2d\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ec5\u5728\u8f93\u5165\u6709\u6548\u7684\u7528\u6237\u540d\u540e\u624d\u4f1a\u51fa\u73b02FA\u9519\u8bef\u9875\u9762\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u4fe1\u606f\u6cc4\u9732\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://www.citrix.com/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-51556",
  "openTime": "2020-09-11",
  "products": {
    "product": "Citrix Systems XenApp 6.5"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-13998",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-12",
  "title": "Citrix Systems XenApp\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e"
}

CVE-2020-13998 (GCVE-0-2020-13998)

Vulnerability from cvelistv5 – Published: 2020-06-11 01:59 – Updated: 2024-08-04 12:32 Unsupported When Assigned

Summary

Citrix XenApp 6.5, when 2FA is enabled, allows a remote unauthenticated attacker to ascertain whether a user exists on the server, because the 2FA error page only occurs after a valid username is entered. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-04-25 17:13 UTC

CWE

n/a
CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://gist.github.com/kampji/11e259d68ad98a6f0f…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
citrix	xenapp	Affected: 6.5.0.0 cpe:2.3:a:citrix:xenapp:6.5.0.0:::::::*

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:citrix:xenapp:6.5.0.0:*:*:*:*:*:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "xenapp",
            "vendor": "citrix",
            "versions": [
              {
                "status": "affected",
                "version": "6.5.0.0"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2020-13998",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-25T17:13:26.714413Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-639",
                "description": "CWE-639 Authorization Bypass Through User-Controlled Key",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-07-23T17:25:58.367Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T12:32:14.840Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://gist.github.com/kampji/11e259d68ad98a6f0f898132f1961a96"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Citrix XenApp 6.5, when 2FA is enabled, allows a remote unauthenticated attacker to ascertain whether a user exists on the server, because the 2FA error page only occurs after a valid username is entered. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-07-09T12:13:39.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://gist.github.com/kampji/11e259d68ad98a6f0f898132f1961a96"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-13998",
          "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": "** UNSUPPORTED WHEN ASSIGNED ** Citrix XenApp 6.5, when 2FA is enabled, allows a remote unauthenticated attacker to ascertain whether a user exists on the server, because the 2FA error page only occurs after a valid username is entered. NOTE: This vulnerability only affects products that are no longer supported by the maintainer."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gist.github.com/kampji/11e259d68ad98a6f0f898132f1961a96",
              "refsource": "MISC",
              "url": "https://gist.github.com/kampji/11e259d68ad98a6f0f898132f1961a96"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2020-13998",
    "datePublished": "2020-06-11T01:59:35.000Z",
    "dateReserved": "2020-06-09T00:00:00.000Z",
    "dateUpdated": "2024-08-04T12:32:14.840Z",
    "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.