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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXE1dmgtNndody14NzQ1

Improper Authorization and Origin Validation Error in OneFuzz

Impact

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:

This can result in read/write access to private data such as:

Via authorized API calls, this also enables tampering with existing data and unauthorized code execution on Azure compute resources.

Patches

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.

Workarounds

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.

References

You can find an overview of the Microsoft Identity Platform here. This vulnerability applies to the multi-tenant application pattern, as described here.

For more information

If you have any questions or comments about this advisory:

Permalink: https://github.com/advisories/GHSA-q5vh-6whw-x745
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXE1dmgtNndody14NzQ1
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 3 years ago
Updated: 3 months ago


CVSS Score: 10.0
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

EPSS Percentage: 0.00713
EPSS Percentile: 0.80276

Identifiers: GHSA-q5vh-6whw-x745, CVE-2021-37705
References: Repository: https://github.com/microsoft/onefuzz
Blast Radius: 9.5

Affected Packages

pypi:onefuzz
Dependent packages: 0
Dependent repositories: 9
Downloads: 1,906 last month
Affected Version Ranges: >= 2.12.0, < 2.31.0
Fixed in: 2.31.0
All affected versions: 2.12.0, 2.13.0, 2.14.0, 2.15.0, 2.16.0, 2.17.0, 2.18.0, 2.19.0, 2.20.0, 2.21.0, 2.22.0, 2.23.0, 2.23.1, 2.24.0, 2.25.0, 2.25.1, 2.26.0, 2.26.1, 2.27.0, 2.28.0, 2.29.0, 2.29.1, 2.30.0
All unaffected versions: 1.0.0, 1.1.0, 1.2.0, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4, 1.4.0, 1.5.0, 1.6.0, 1.7.0, 1.8.0, 1.9.0, 1.10.0, 1.11.0, 2.0.0, 2.1.0, 2.1.1, 2.2.0, 2.3.0, 2.4.0, 2.5.0, 2.6.0, 2.7.0, 2.8.0, 2.9.0, 2.10.0, 2.11.0, 2.11.1, 2.31.0, 2.32.0, 2.33.0, 2.33.1, 3.0.0, 3.1.0, 3.2.0, 4.0.0, 4.1.0, 5.0.0, 5.1.0, 5.2.0, 5.3.0, 5.4.0, 5.4.1, 5.5.0, 5.6.0, 5.7.0, 5.7.1, 5.8.0, 5.9.0, 5.10.0, 5.11.0, 5.12.0, 5.14.0, 5.14.1, 5.15.0, 5.15.1, 5.16.0, 5.17.0, 5.18.0, 5.19.0, 5.20.0, 6.0.0, 6.1.0, 6.2.0, 6.3.0, 6.4.0, 7.0.0, 8.0.0, 8.1.0, 8.2.0, 8.3.0, 8.4.0, 8.5.0, 8.6.0, 8.6.1, 8.6.2, 8.6.3, 8.7.0, 8.7.1, 8.8.0, 8.9.0, 9.0.0