Server-side request forgery in Next.js Server Actions

1) Server-Side Request Forgery (SSRF)

EUVDB-ID: #VU89341

Risk: Medium

CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2024-34351

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

Exploit availability: Yes

Description

The disclosed vulnerability allows a remote attacker to perform SSRF attacks.

The vulnerability exists due to insufficient validation of user-supplied input in Next.js Server Actions. A remote attacker can send a specially crafted HTTP request with a modified Host header and trick the application to initiate requests to arbitrary systems.

Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Next.js: 13.4.0 - 14.1.0

CPE2.3

• cpe:2.3:a:zeit:nextjs:13.4.19:*:*:*:*:*:*:*
• cpe:2.3:a:zeit:nextjs:13.5.6:*:*:*:*:*:*:*
• cpe:2.3:a:zeit:nextjs:14.0.4:*:*:*:*:*:*:*
• cpe:2.3:a:zeit:nextjs:14.1.0:*:*:*:*:*:*:*

External links

https://github.com/vercel/next.js/security/advisories/GHSA-fr5h-rqp8-mj6g

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.