Vulnerability-Lookup

CNVD-2021-37776

Vulnerability from cnvd - Published: 2021-05-28

Title

fastecdsa数据伪造问题漏洞

Description

fastecdsa是AntonKueltz软件开发者的一款用于快速椭圆曲线加密的Python库。 fastecdsa 2.1.2之前版本中存在安全漏洞。攻击者可利用漏洞通过成功猜测签名验证将失败的用户而获益。

Severity

中

Patch Name

fastecdsa数据伪造问题漏洞的补丁

Patch Description

fastecdsa是AntonKueltz软件开发者的一款用于快速椭圆曲线加密的Python库。 fastecdsa 2.1.2之前版本中存在安全漏洞。攻击者可利用漏洞通过成功猜测签名验证将失败的用户而获益。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://github.com/AntonKueltz/fastecdsa/commit/7b64e3efaa806b4daaf73bb5172af3581812f8de

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-12607

Impacted products

Name
fastecdsa fastecdsa <2.1.2

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2020-12607"
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-37776",
  "openTime": "2021-05-28",
  "patchDescription": "fastecdsa\u662fAntonKueltz\u8f6f\u4ef6\u5f00\u53d1\u8005\u7684\u4e00\u6b3e\u7528\u4e8e\u5feb\u901f\u692d\u5706\u66f2\u7ebf\u52a0\u5bc6\u7684Python\u5e93\u3002\r\n\r\nfastecdsa 2.1.2\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u6f0f\u6d1e\u901a\u8fc7\u6210\u529f\u731c\u6d4b\u7b7e\u540d\u9a8c\u8bc1\u5c06\u5931\u8d25\u7684\u7528\u6237\u800c\u83b7\u76ca\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": "fastecdsa\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "fastecdsa fastecdsa \u003c2.1.2"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-12607",
  "serverity": "\u4e2d",
  "submitTime": "2020-06-03",
  "title": "fastecdsa\u6570\u636e\u4f2a\u9020\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2020-12607 (GCVE-0-2020-12607)

Vulnerability from cvelistv5 – Published: 2020-06-02 21:00 – Updated: 2024-08-04 12:04

Summary

An issue was discovered in fastecdsa before 2.1.2. When using the NIST P-256 curve in the ECDSA implementation, the point at infinity is mishandled. This means that for an extreme value in k and s^-1, the signature verification fails even if the signature is correct. This behavior is not solely a usability problem. There are some threat models where an attacker can benefit by successfully guessing users for whom signature verification will fail.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

4 references

URL	Tags
https://github.com/AntonKueltz/fastecdsa/commit/4…	x_refsource_CONFIRM
https://github.com/AntonKueltz/fastecdsa/issues/52	x_refsource_CONFIRM
https://github.com/AntonKueltz/fastecdsa/commit/e…	x_refsource_CONFIRM
https://github.com/AntonKueltz/fastecdsa/commit/7…	x_refsource_CONFIRM

Date Public

2020-06-01 00:00

Show details on NVD website

JSON

To clipboard

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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.