Path traversal in Next.js - #VU6872

Vulnerability identifier: #VU6872

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green

CVE-ID: N/A

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: vercel

Affected software:
Next.js

The vulnerability allows a remote attacker to view contest of arbitrary files on the system.

The vulnerability exists due to insufficient input validation when processing requests sent to /_next</code> and <code>/static namespaces. A remote attacker can send a specially crafted HTTP GET request, containing directory traversal sequences and view contest of arbitrary files on the system.

Exploitation example:

http://[host]/_next\..\..\..\..\..\..\..\..\..\etc\passwd

Update to version 2.4.1

• https://send-patch.now.sh/
• http://www.securitylab.ru/blog/personal/raz0r/341958.php