CVE-2024-29041 Express.js Open Redirect in malformed URLs

2024-03-2520:20:06

CWE-1286

CWE-601

GitHub_M

www.cve.org

express.js

open redirect

malformed urls

vulnerability

location header

encodeurl

bypass

allow list

fixed.

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

6.2 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.4%

JSON

Express.js minimalist web framework for node. Versions of Express.js prior to 4.19.0 and all pre-release alpha and beta versions of 5.0 are affected by an open redirect vulnerability using malformed URLs. When a user of Express performs a redirect using a user-provided URL Express performs an encode using encodeurl on the contents before passing it to the location header. This can cause malformed URLs to be evaluated in unexpected ways by common redirect allow list implementations in Express applications, leading to an Open Redirect via bypass of a properly implemented allow list. The main method impacted is res.location() but this is also called from within res.redirect(). The vulnerability is fixed in 4.19.2 and 5.0.0-beta.3.

CNA Affected

[
  {
    "vendor": "expressjs",
    "product": "express",
    "versions": [
      {
        "version": ">=4.14.0, <4.19.0",
        "status": "affected"
      },
      {
        "version": ">=5.0.0-alpha.1, <5.0.0-beta.3",
        "status": "affected"
      }
    ]
  }
]