CVE-2021-29456

Published Apr 21, 2021

Last updated 4 years ago

Overview

Description: 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.
Source: security-advisories@github.com
NVD status: Analyzed

Hype score: Not currently trending

Risk scores

CVSS 3.1

Type: Primary
Base score: 5.4
Impact score: 2.7
Exploitability score: 2.3
Vector string: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Severity: MEDIUM

CVSS 2.0

Type: Primary
Base score: 4.9
Impact score: 4.9
Exploitability score: 6.8
Vector string: AV:N/AC:M/Au:S/C:P/I:P/A:N

Weaknesses

security-advisories@github.com: CWE-601

Configurations

[
  {
    "nodes": [
      {
        "negate": false,
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:authelia:authelia:*:*:*:*:*:*:*:*",
            "vulnerable": true,
            "matchCriteriaId": "8CE1C08B-D5C4-41B8-9C55-E08A07AF7FF4",
            "versionEndExcluding": "4.28.0"
          }
        ],
        "operator": "OR"
      }
    ]
  }
]

Overview

Social media

Risk scores

CVSS 3.1

CVSS 2.0

Weaknesses

Configurations

References