CVE-2020-15233 : ORY Fosite is a security first OAuth2 & OpenID Connect framework for Go. In Fosite from version 0.30.2 and before versio

ORY Fosite is a security first OAuth2 & OpenID Connect framework for Go. In Fosite from version 0.30.2 and before version 0.34.1, there is an issue in which an an attacker can override the registered redirect URL by performing an OAuth flow and requesting a redirect URL that is to the loopback adapter. Attackers can provide both custom URL query parameters to their loopback redirect URL, as well as actually overriding the host of the registered redirect URL. These attacks are only applicable in scenarios where the attacker has access over the loopback interface. This vulnerability has been patched in ORY Fosite v0.34.1.

Published 2020-10-02 21:15:12

Updated 2021-11-18 16:48:07

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: Open redirectInput validation

Exploit prediction scoring system (EPSS) score for CVE-2020-15233

EPSS FAQ

0.05%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 17 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-15233

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
4.9	MEDIUM	AV:N/AC:M/Au:S/C:P/I:P/A:N	6.8	4.9	NIST
Access Vector: Network Access Complexity: Medium Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
4.8	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N	1.7	2.7	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: Required Scope: Changed Confidentiality: Low Integrity: Low Availability: None
6.1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N	0.9	5.2	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: None

CWE ids for CVE-2020-15233

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: security-advisories@github.com (Secondary)

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

Assigned by:

nvd@nist.gov (Primary)
security-advisories@github.com (Secondary)

References for CVE-2020-15233

https://github.com/ory/fosite/commit/cdee51ebe721bfc8acca0fd0b86b030ca70867bf

fix: make redirect URL checking more strict · ory/fosite@cdee51e · GitHub
Patch;Third Party Advisory

CVEs referencing this url
https://github.com/ory/fosite/security/advisories/GHSA-rfq3-w54c-f9q5

OAuth2 Redirect URL validity does not respect query parameters and host for loopback addresses · Advisory · ory/fosite · GitHub
Third Party Advisory

Products affected by CVE-2020-15233

ORY » Fosite
Versions from including (>=) 0.30.2 and before (<) 0.34.1
cpe:2.3:a:ory:fosite:*:*:*:*:*:*:*:*
Matching versions

Vulnerability Details : CVE-2020-15233

Exploit prediction scoring system (EPSS) score for CVE-2020-15233

CVSS scores for CVE-2020-15233

CWE ids for CVE-2020-15233

References for CVE-2020-15233

Products affected by CVE-2020-15233