CVE-2021-43803 Unexpected server crash in Next.js

2021-12-0923:50:10

CWE-20

GitHub_M

www.cve.org

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.8 High

AI Score

Confidence

High

0.004 Low

EPSS

Percentile

73.3%

JSON

Next.js is a React framework. In versions of Next.js prior to 12.0.5 or 11.1.3, invalid or malformed URLs could lead to a server crash. In order to be affected by this issue, the deployment must use Next.js versions above 11.1.0 and below 12.0.5, Node.js above 15.0.0, and next start or a custom server. Deployments on Vercel are not affected, along with similar environments where invalid requests are filtered before reaching Next.js. Versions 12.0.5 and 11.1.3 contain patches for this issue.

CNA Affected

[
  {
    "product": "next.js",
    "vendor": "vercel",
    "versions": [
      {
        "status": "affected",
        "version": ">= 11.1.0, < 11.1.3"
      },
      {
        "status": "affected",
        "version": ">= 12.0.0, < 12.0.5"
      }
    ]
  }
]