CVE-2021-29456

Authelia is an open-source authentication and authorization server providing 2-factor authentication and single sign-on (SSO) for your applications via a web portal. In versions 4.27.4 and earlier, utilizing a HTTP query parameter an attacker is able to redirect users from the web application to any domain, including potentially malicious sites. This security issue does not directly impact the security of the web application itself. As a workaround, one can use a reverse proxy to strip the query parameter from the affected endpoint. There is a patch for version 4.28.0.

CVSS v3 5.7 MEDIUM
CVSS v2.0 4.9 MEDIUM

5.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

4.9^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:S/C:P/I:P/A:N

Exploitability : 6.8 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://github.com/authelia/authelia/security/advisories/GHSA-36f2-fcrx-fp4j	Patch Third Party Advisory
https://github.com/authelia/authelia/security/advisories/GHSA-36f2-fcrx-fp4j	Patch Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:authelia:authelia:*:*:*:*:*:*:*:*

History

21 Nov 2024, 06:01

Type	Values Removed	Values Added
References	~~() https://github.com/authelia/authelia/security/advisories/GHSA-36f2-fcrx-fp4j - Patch, Third Party Advisory~~	() https://github.com/authelia/authelia/security/advisories/GHSA-36f2-fcrx-fp4j - Patch, Third Party Advisory
CVSS	v2 : ~~4.9~~ v3 : ~~5.4~~	v2 : 4.9 v3 : 5.7

Information

Published : 2021-04-21 19:15

Updated : 2024-11-21 06:01

NVD link : CVE-2021-29456

Mitre link : CVE-2021-29456

CVE.ORG link : CVE-2021-29456

JSON object : View

Products Affected

authelia

authelia

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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