cnvd - cnvd-2021-28744

CNVD-2021-28744

Vulnerability from cnvd - Published: 2021-04-16

Title

Saml2 Authentication services for ASP.NET存在未明漏洞

Description

Saml2 Authentication services for ASP.NET是一款用于ASP.NET的SAML（安全声明标记语言）身份验证服务。 Saml2 Authentication services for ASP.NET 1.0.2版本和2.0.0版本至2.6.0版本中令牌验证的方法存在安全漏洞。攻击者可利用该漏洞创建登录会话。

Severity

中

Patch Name

Saml2 Authentication services for ASP.NET存在未明漏洞的补丁

Patch Description

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/Sustainsys/Saml2/security/advisories/GHSA-9475-xg6m-j7pw

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-5268

Impacted products

Name
['sustainsys Saml2 1.0.2', 'sustainsys Saml2 >=2.0.0，<=2.6.0']

Show details on source website

JSON

To clipboard

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    "cve": {
      "cveNumber": "CVE-2020-5268"
    }
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  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-28744",
  "openTime": "2021-04-16",
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    ]
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  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-5268",
  "serverity": "\u4e2d",
  "submitTime": "2020-04-22",
  "title": "Saml2 Authentication services for ASP.NET\u5b58\u5728\u672a\u660e\u6f0f\u6d1e"
}

CVE-2020-5268 (GCVE-0-2020-5268)

Vulnerability from cvelistv5 – Published: 2020-04-21 15:30 – Updated: 2024-08-04 08:22

Summary

In Saml2 Authentication Services for ASP.NET versions before 1.0.2, and between 2.0.0 and 2.6.0, there is a vulnerability in how tokens are validated in some cases. Saml2 tokens are usually used as bearer tokens - a caller that presents a token is assumed to be the subject of the token. There is also support in the Saml2 protocol for issuing tokens that is tied to a subject through other means, e.g. holder-of-key where possession of a private key must be proved. The Sustainsys.Saml2 library incorrectly treats all incoming tokens as bearer tokens, even though they have another subject confirmation method specified. This could be used by an attacker that could get access to Saml2 tokens with another subject confirmation method than bearer. The attacker could then use such a token to create a log in session. This vulnerability is patched in versions 1.0.2 and 2.7.0.

Severity ?

6.5 (Medium)


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

CWE

CWE-303 - Incorrect Implementation of Authentication Algorithm

Assigner

GitHub_M

References

URL

Tags

	https://github.com/Sustainsys/Saml2/commit/e58e0a…	x_refsource_MISC
	https://github.com/Sustainsys/Saml2/security/advi…	x_refsource_CONFIRM
	https://github.com/Sustainsys/Saml2/issues/712	x_refsource_MISC
	https://www.nuget.org/packages/Sustainsys.Saml2/	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	Sustainsys	Saml2	Affected: < 1.0.2 Affected: >= 2.0.0, <= 2.6.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T08:22:09.027Z",
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          "versions": [
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            },
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      ],
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        }
      ],
      "metrics": [
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        "discovery": "UNKNOWN"
      },
      "title": "Subject Confirmation Method not validated in Saml2 Authentication Services for ASP.NET",
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}

Sightings

Author	Source	Type	Date

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-2021-28744

CVE-2020-5268 (GCVE-0-2020-5268)

Tags

Sightings

Nomenclature