Vulnerability-Lookup

FKIE_CVE-2021-32541

Vulnerability from fkie_nvd - Published: 2021-05-28 08:15 - Updated: 2026-06-17 03:53

Severity

5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Summary

The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services

References

URL	Tags
twcert@cert.org.tw	https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344	Third Party Advisory
twcert@cert.org.tw	https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html	Third Party Advisory

Impacted products

	Vendor	Product	Version
	sysjust	cts_web	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "CTS Web",
          "vendor": "SysJust",
          "versions": [
            {
              "lessThanOrEqual": "released 2021.3.25",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "twcert@cert.org.tw"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:sysjust:cts_web:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C5DB6391-81C8-47A2-A1F2-1B127E1FFC7E",
              "versionEndExcluding": "2021.3.24",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services"
    },
    {
      "lang": "es",
      "value": "El sistema de transacciones CTS Web relacionado con la autenticaci\u00f3n y la gesti\u00f3n de sesiones es implementado incorrectamente, lo que permite a atacantes remotos no autenticados enviar una gran cantidad de nombres de usuario v\u00e1lidos y forzar a las personas que han iniciado sesi\u00f3n a cerrar la sesi\u00f3n, causando que el usuario no pueda acceder a los servicios"
    }
  ],
  "id": "CVE-2021-32541",
  "lastModified": "2026-06-17T03:53:08.417",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "twcert@cert.org.tw",
        "type": "Secondary"
      }
    ]
  },
  "published": "2021-05-28T08:15:07.057",
  "references": [
    {
      "source": "twcert@cert.org.tw",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344"
    },
    {
      "source": "twcert@cert.org.tw",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html"
    }
  ],
  "sourceIdentifier": "twcert@cert.org.tw",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-32541 (GCVE-0-2021-32541)

Vulnerability from cvelistv5 – Published: 2021-05-28 08:10 – Updated: 2024-09-17 00:46

Title

SysJust CTS Web - Broken Access Control

Summary

Severity

5.3 (Medium)


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

CWE

None

Assigner

twcert mitre root

References

2 references

URL	Tags
https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html	x_refsource_MISC
https://www.chtsecurity.com/news/40e165e2-e539-49…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
SysJust	CTS Web	Affected: unspecified , ≤ released 2021.3.25 (custom)

Date Public

2021-05-28 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:25:30.914Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "CTS Web",
          "vendor": "SysJust",
          "versions": [
            {
              "lessThanOrEqual": "released 2021.3.25",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2021-05-28T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "None",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-07-21T10:25:27.000Z",
        "orgId": "cded6c7f-6ce5-4948-8f87-aa7a3bbb6b0e",
        "shortName": "twcert"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Update CTS to version released after 2021.3.25"
        }
      ],
      "source": {
        "advisory": "TVN-202105003",
        "discovery": "EXTERNAL"
      },
      "title": "SysJust CTS Web - Broken Access Control",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "AKA": "TWCERT/CC",
          "ASSIGNER": "cve@cert.org.tw",
          "DATE_PUBLIC": "2021-05-28T07:56:00.000Z",
          "ID": "CVE-2021-32541",
          "STATE": "PUBLIC",
          "TITLE": "SysJust CTS Web - Broken Access Control"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "CTS Web",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c=",
                            "version_value": "released 2021.3.25"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "SysJust"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services"
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "None"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html",
              "refsource": "MISC",
              "url": "https://www.twcert.org.tw/tw/cp-132-4757-893eb-1.html"
            },
            {
              "name": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344",
              "refsource": "CONFIRM",
              "url": "https://www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "Update CTS to version released after 2021.3.25"
          }
        ],
        "source": {
          "advisory": "TVN-202105003",
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cded6c7f-6ce5-4948-8f87-aa7a3bbb6b0e",
    "assignerShortName": "twcert",
    "cveId": "CVE-2021-32541",
    "datePublished": "2021-05-28T08:10:27.063Z",
    "dateReserved": "2021-05-10T00:00:00.000Z",
    "dateUpdated": "2024-09-17T00:46:15.943Z",
    "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.