Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWdyZnAtcTJtbS1oZnA2

Redirect URL matching ignores character casing

Impact

Before version v0.34.1, the OAuth 2.0 Client's registered redirect URLs and the redirect URL provided at the OAuth2 Authorization Endpoint where compared using strings.ToLower while they should have been compared with a simple string match:

1. Registering a client with allowed redirect URL https://example.com/callback
2. Performing OAuth2 flow and requesting redirect URL https://example.com/CALLBACK
3. Instead of an error (invalid redirect URL), the browser is redirected to https://example.com/CALLBACK with a potentially successful OAuth2 response, depending on the state of the overall OAuth2 flow (the user might still deny the request for example).

Permalink: https://github.com/advisories/GHSA-grfp-q2mm-hfp6
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWdyZnAtcTJtbS1oZnA2
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 2 years ago
Updated: 4 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N

Identifiers: GHSA-grfp-q2mm-hfp6, CVE-2020-15234
References:

• https://github.com/ory/fosite/security/advisories/GHSA-grfp-q2mm-hfp6
• https://nvd.nist.gov/vuln/detail/CVE-2020-15234
• https://github.com/ory/fosite/commit/cdee51ebe721bfc8acca0fd0b86b030ca70867bf
• https://github.com/advisories/GHSA-grfp-q2mm-hfp6

Affected Packages