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Next.js Vulnerable to HTTP Request Smuggling

High severity GitHub Reviewed Published May 9, 2024 in vercel/next.js • Updated Jul 9, 2024

Package

npm next (npm)

Affected versions

>= 13.4.0, < 13.5.1

Patched versions

13.5.1

Description

Impact

Inconsistent interpretation of a crafted HTTP request meant that requests are treated as both a single request, and two separate requests by Next.js, leading to desynchronized responses. This led to a response queue poisoning vulnerability in the affected Next.js versions.

For a request to be exploitable, the affected route also had to be making use of the rewrites feature in Next.js.

Patches

The vulnerability is resolved in Next.js 13.5.1 and newer. This includes Next.js 14.x.

Workarounds

There are no official workarounds for this vulnerability. We recommend that you upgrade to a safe version.

References

https://portswigger.net/web-security/request-smuggling/advanced/response-queue-poisoning

References

@jackwilson323 jackwilson323 published to vercel/next.js May 9, 2024
Published to the GitHub Advisory Database May 9, 2024
Reviewed May 9, 2024
Published by the National Vulnerability Database May 14, 2024
Last updated Jul 9, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

EPSS score

0.043%
(11th percentile)

Weaknesses

CVE ID

CVE-2024-34350

GHSA ID

GHSA-77r5-gw3j-2mpf

Source code

Credits

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