Vulnerability-Lookup

CNVD-2018-16853

Vulnerability from cnvd - Published: 2018-08-30

Title

MyCryptoChamp信息泄露漏洞

Description

MyCryptoChamp是一款基于以太坊的区块链游戏。 MyCryptoChamp的智能合约实现中的‘randMod()’函数存在信息泄露漏洞，该漏洞源于‘randMod()’函数生成了含有公共可读取的变量和私有变量的随机值。攻击者可利用该漏洞获取强大的champs和物品并获得奖励。

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://mycryptochamp.io/

Reference

https://etherscan.io/address/0x689FB61845488297dfE7586E5f7956475955d2Dc https://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430 https://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df

Impacted products

Name
MyCryptoChamp MyCryptoChamp

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2018-12885"
    }
  },
  "description": "MyCryptoChamp\u662f\u4e00\u6b3e\u57fa\u4e8e\u4ee5\u592a\u574a\u7684\u533a\u5757\u94fe\u6e38\u620f\u3002\r\n\r\nMyCryptoChamp\u7684\u667a\u80fd\u5408\u7ea6\u5b9e\u73b0\u4e2d\u7684\u2018randMod()\u2019\u51fd\u6570\u5b58\u5728\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u2018randMod()\u2019\u51fd\u6570\u751f\u6210\u4e86\u542b\u6709\u516c\u5171\u53ef\u8bfb\u53d6\u7684\u53d8\u91cf\u548c\u79c1\u6709\u53d8\u91cf\u7684\u968f\u673a\u503c\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u83b7\u53d6\u5f3a\u5927\u7684champs\u548c\u7269\u54c1\u5e76\u83b7\u5f97\u5956\u52b1\u3002",
  "discovererName": "unknown",
  "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://mycryptochamp.io/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2018-16853",
  "openTime": "2018-08-30",
  "products": {
    "product": "MyCryptoChamp MyCryptoChamp"
  },
  "referenceLink": "https://etherscan.io/address/0x689FB61845488297dfE7586E5f7956475955d2Dc\r\nhttps://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430\r\nhttps://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df",
  "serverity": "\u4e2d",
  "submitTime": "2018-08-09",
  "title": "MyCryptoChamp\u4fe1\u606f\u6cc4\u9732\u6f0f\u6d1e"
}

CVE-2018-12885 (GCVE-0-2018-12885)

Vulnerability from cvelistv5 – Published: 2018-08-07 15:00 – Updated: 2024-08-05 08:45

Summary

The randMod() function of the smart contract implementation for MyCryptoChamp, an Ethereum game, generates a random value with publicly readable variables such as the current block information and a private variable, (which can be read with a getStorageAt call). Therefore, attackers can get powerful champs/items and get rewards.

Severity

No CVSS data available.

CWE

Assigner

mitre

References

3 references

URL	Tags
https://etherscan.io/address/0xa44e464b1328034090…	x_refsource_MISC
https://medium.com/coinmonks/get-legendary-items-…	x_refsource_MISC
https://etherscan.io/address/0x689FB61845488297df…	x_refsource_MISC

Date Public

2018-07-30 00:00

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-05T08:45:02.506Z",
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        },
        "references": [
          {
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              "x_transferred"
            ],
            "url": "https://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430"
          },
          {
            "tags": [
              "x_refsource_MISC",
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            ],
            "url": "https://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://etherscan.io/address/0x689FB61845488297dfE7586E5f7956475955d2Dc"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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      "descriptions": [
        {
          "lang": "en",
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        }
      ],
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      "providerMetadata": {
        "dateUpdated": "2018-08-07T14:57:01.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
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          ],
          "url": "https://etherscan.io/address/0xa44e464b13280340904ffef0a65b8a0033460430"
        },
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          "url": "https://medium.com/coinmonks/get-legendary-items-by-breaking-pnrg-of-mycyptochamp-an-ethereum-online-game-cve-2018-12855-6e6beb41b8df"
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      ],
      "x_legacyV4Record": {
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          "ASSIGNER": "cve@mitre.org",
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            {
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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.

Action not permitted

CNVD-2018-16853

CVE-2018-12885 (GCVE-0-2018-12885)

Tags

Sightings

Nomenclature