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CVE-2021-37705— Improper Authorization and Origin Validation Error in OneFuzz

Quick assessment

Affected
microsoft onefuzz
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft OneFuzz是美国微软（Microsoft）公司的一个跨平台的免费和开源的模糊测试框架。 Microsoft OneFuzz 2.12.0到2.31.0版本存在授权问题漏洞，该漏洞源于受影响产品版本中存在不完整的授权检查，任何经过验证的用户都可以通过授权接口调用，进行私有数据的读写访问，并且可以篡改现有数据以及在Azure计算资源中执行未授权的代码。

CVSS 10.0 · Critical EPSS 2.42% · P83
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I. Basic Information for CVE-2021-37705

Vulnerability Information
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Vulnerability Title
Improper Authorization and Origin Validation Error in OneFuzz
Source: CVE Program / CVE List V5
Vulnerability Description
OneFuzz is an open source self-hosted Fuzzing-As-A-Service platform. Starting with OneFuzz 2.12.0 or greater, an incomplete authorization check allows an authenticated user from any Azure Active Directory tenant to make authorized API calls to a vulnerable OneFuzz instance. To be vulnerable, a OneFuzz deployment must be both version 2.12.0 or greater and deployed with the non-default --multi_tenant_domain option. This can result in read/write access to private data such as software vulnerability and crash information, security testing tools and proprietary code and symbols. Via authorized API calls, this also enables tampering with existing data and unauthorized code execution on Azure compute resources. This issue is resolved starting in release 2.31.0, via the addition of application-level check of the bearer token's `issuer` against an administrator-configured allowlist. As a workaround users can restrict access to the tenant of a deployed OneFuzz instance < 2.31.0 by redeploying in the default configuration, which omits the `--multi_tenant_domain` option.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft OneFuzz 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft OneFuzz是美国微软（Microsoft）公司的一个跨平台的免费和开源的模糊测试框架。 Microsoft OneFuzz 2.12.0到2.31.0版本存在授权问题漏洞，该漏洞源于受影响产品版本中存在不完整的授权检查，任何经过验证的用户都可以通过授权接口调用，进行私有数据的读写访问，并且可以篡改现有数据以及在Azure计算资源中执行未授权的代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
microsoft onefuzz >= 2.12.0, < 2.31.0 -

II. Public POCs for CVE-2021-37705

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III. Intelligence Information for CVE-2021-37705

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Patches & Fixes for CVE-2021-37705 (2)

Vendor Advisories for CVE-2021-37705 (1)

Other References for CVE-2021-37705 (2)

IV. Related Vulnerabilities

Same vendor: microsoft
Same weakness: CWE-285

V. Comments for CVE-2021-37705

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