Vulnerability-Lookup

CNVD-2021-95642

Vulnerability from cnvd - Published: 2021-12-09

Title

Stark Bank数据伪造问题漏洞（CNVD-2021-95642）

Description

Stark Bank是巴西个人开发者的一个银行API。通过 API 执行所有银行业务，简化和自动化支付、促进对账和扩展业务。 Stark Bank ecdsa-elixir存在数据伪造问题漏洞，该漏洞源于产品的verify函数未能检查签名是否为非零，攻击者可利用该漏洞在任意消息上伪造签名。

Severity

高

Patch Name

Stark Bank数据伪造问题漏洞（CNVD-2021-95642）的补丁

Patch Description

Stark Bank是巴西个人开发者的一个银行API。通过 API 执行所有银行业务，简化和自动化支付、促进对账和扩展业务。 Stark Bank ecdsa-elixir存在数据伪造问题漏洞，该漏洞源于产品的verify函数未能检查签名是否为非零，攻击者可利用该漏洞在任意消息上伪造签名。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1

Reference

https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1

Impacted products

Name
Stark Bank Stark Bank ecdsa-elixir 1.0.0

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-43568",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-43568"
    }
  },
  "description": "Stark Bank\u662f\u5df4\u897f\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u4e2a\u94f6\u884cAPI\u3002\u901a\u8fc7 API \u6267\u884c\u6240\u6709\u94f6\u884c\u4e1a\u52a1\uff0c\u7b80\u5316\u548c\u81ea\u52a8\u5316\u652f\u4ed8\u3001\u4fc3\u8fdb\u5bf9\u8d26\u548c\u6269\u5c55\u4e1a\u52a1\u3002\n\nStark Bank ecdsa-elixir\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u7684verify\u51fd\u6570\u672a\u80fd\u68c0\u67e5\u7b7e\u540d\u662f\u5426\u4e3a\u975e\u96f6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u4efb\u610f\u6d88\u606f\u4e0a\u4f2a\u9020\u7b7e\u540d\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-95642",
  "openTime": "2021-12-09",
  "patchDescription": "Stark Bank\u662f\u5df4\u897f\u4e2a\u4eba\u5f00\u53d1\u8005\u7684\u4e00\u4e2a\u94f6\u884cAPI\u3002\u901a\u8fc7 API \u6267\u884c\u6240\u6709\u94f6\u884c\u4e1a\u52a1\uff0c\u7b80\u5316\u548c\u81ea\u52a8\u5316\u652f\u4ed8\u3001\u4fc3\u8fdb\u5bf9\u8d26\u548c\u6269\u5c55\u4e1a\u52a1\u3002\r\n\r\nStark Bank ecdsa-elixir\u5b58\u5728\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u4ea7\u54c1\u7684verify\u51fd\u6570\u672a\u80fd\u68c0\u67e5\u7b7e\u540d\u662f\u5426\u4e3a\u975e\u96f6\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5728\u4efb\u610f\u6d88\u606f\u4e0a\u4f2a\u9020\u7b7e\u540d\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": "Stark Bank\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-95642\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Stark Bank Stark Bank ecdsa-elixir 1.0.0"
  },
  "referenceLink": "https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1",
  "serverity": "\u9ad8",
  "submitTime": "2021-11-11",
  "title": "Stark Bank\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2021-95642\uff09"
}

CVE-2021-43568 (GCVE-0-2021-43568)

Vulnerability from cvelistv5 – Published: 2021-11-09 21:06 – Updated: 2024-08-04 04:03

Summary

The verify function in the Stark Bank Elixir ECDSA library (ecdsa-elixir) 1.0.0 fails to check that the signature is non-zero, which allows attackers to forge signatures on arbitrary messages.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

2 references

URL	Tags
https://research.nccgroup.com/2021/11/08/technica…	x_refsource_MISC
https://github.com/starkbank/ecdsa-elixir/release…	x_refsource_MISC

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{
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T04:03:08.620Z",
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            "url": "https://research.nccgroup.com/2021/11/08/technical-advisory-arbitrary-signature-forgery-in-stark-bank-ecdsa-libraries/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "versions": [
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      "descriptions": [
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          "lang": "en",
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        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
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          "tags": [
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          ],
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        },
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/starkbank/ecdsa-elixir/releases/tag/v1.0.1"
        }
      ],
      "x_legacyV4Record": {
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        "affects": {
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                  "product_data": [
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                      "version": {
                        "version_data": [
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  "cveMetadata": {
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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.

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.