Vulnerability-Lookup

CNVD-2021-38321

Vulnerability from cnvd - Published: 2021-06-01

Title

Telegram拒绝服务漏洞

Description

Telegram是一款即时通信移动应用程序。 Telegram app for iOS 7.6.2版本的MtProtoKitFramework存在拒绝服务漏洞。经过身份认证的远程攻击者可利用该漏洞导致拒绝服务。

Severity

低

Formal description

目前厂商暂未发布修复措施解决此安全问题，建议使用此软件的用户随时关注厂商主页或参考网址以获取解决办法： https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-30496

Impacted products

Name
Telegram Telegram app for iOS 7.6.2

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-30496",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-30496"
    }
  },
  "description": "Telegram\u662f\u4e00\u6b3e\u5373\u65f6\u901a\u4fe1\u79fb\u52a8\u5e94\u7528\u7a0b\u5e8f\u3002\n\nTelegram app for iOS 7.6.2\u7248\u672c\u7684MtProtoKitFramework\u5b58\u5728\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u3002\u7ecf\u8fc7\u8eab\u4efd\u8ba4\u8bc1\u7684\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u6682\u672a\u53d1\u5e03\u4fee\u590d\u63aa\u65bd\u89e3\u51b3\u6b64\u5b89\u5168\u95ee\u9898\uff0c\u5efa\u8bae\u4f7f\u7528\u6b64\u8f6f\u4ef6\u7684\u7528\u6237\u968f\u65f6\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u6216\u53c2\u8003\u7f51\u5740\u4ee5\u83b7\u53d6\u89e3\u51b3\u529e\u6cd5\uff1a\r\nhttps://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-38321",
  "openTime": "2021-06-01",
  "products": {
    "product": "Telegram Telegram app for iOS 7.6.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-30496",
  "serverity": "\u4f4e",
  "submitTime": "2021-04-22",
  "title": "Telegram\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e"
}

CVE-2021-30496 (GCVE-0-2021-30496)

Vulnerability from cvelistv5 – Published: 2021-04-20 00:00 – Updated: 2024-08-03 22:32 Disputed

Summary

The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of service (application crash) if the victim pastes an attacker-supplied message (e.g., in the Persian language) into a channel or group. The crash occurs in MtProtoKitFramework. NOTE: the vendor's perspective is that "this behavior can't be considered a vulnerability."

Severity

5.7 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-05-01 14:44 UTC

CWE

n/a
CWE-121 - Stack-based Buffer Overflow

Assigner

mitre mitre root

References

2 references

URL	Tags
https://gist.github.com/raminfp/bf64c2974ee694978…
https://t.me/joinchat/bJ9cnUosVh03ZTI0

Impacted products

1 product

Vendor	Product	Version
telegram	telegram	Affected: 7.6.2 cpe:2.3:a:telegram:telegram::::::iphone_os::*

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "cpes": [
              "cpe:2.3:a:telegram:telegram:*:*:*:*:*:iphone_os:*:*"
            ],
            "defaultStatus": "unknown",
            "product": "telegram",
            "vendor": "telegram",
            "versions": [
              {
                "status": "affected",
                "version": "7.6.2"
              }
            ]
          }
        ],
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 5.7,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2021-30496",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-01T14:44:16.196509Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-121",
                "description": "CWE-121 Stack-based Buffer Overflow",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:12:40.657Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T22:32:41.088Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://t.me/joinchat/bJ9cnUosVh03ZTI0"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of service (application crash) if the victim pastes an attacker-supplied message (e.g., in the Persian language) into a channel or group. The crash occurs in MtProtoKitFramework. NOTE: the vendor\u0027s perspective is that \"this behavior can\u0027t be considered a vulnerability.\""
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-14T00:00:00.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31"
        },
        {
          "url": "https://t.me/joinchat/bJ9cnUosVh03ZTI0"
        }
      ],
      "tags": [
        "disputed"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-30496",
    "datePublished": "2021-04-20T00:00:00.000Z",
    "dateReserved": "2021-04-11T00:00:00.000Z",
    "dateUpdated": "2024-08-03T22:32:41.088Z",
    "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.
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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.
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CNVD-2021-38321

CVE-2021-30496 (GCVE-0-2021-30496)

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