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Server-Side Request Forgery in ftp-srvGHSA-r4m5-47cq-6qg8

GHSA-r4m5-47cq-6qg8 is a security vulnerability in ftp-srv. A fix is available for ftp-srv — see the affected versions and patch details below.

Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Jan 8, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

3 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

29other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
ftp-srvnpm
30Kdownloads / week

Description

All versions of ftp-srv from v1.0.0 onward to v4.3.3 are vulnerable to Server-Side Request Forgery (SSRF). The package fails to prevent remote clients to access other resources in the network, for example when connecting to the server through telnet. This allows attackers to access any network resources available to the server, including private resources in the hosting environment.

Recommendation

Upgrade to patched versions ^2.19.6, ^3.1.2, ^4.3.4

Workarounds

Blacklisting the FTP Command PORT will prevent the server from exposing this behaviour through active connections until a fix is applied.

const ftp = new FtpSrv({
  blacklist: ['PORT']
});

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
📦npmftp-srv≥ 1.0.0&&< 2.19.62.19.6npm install ftp-srv@2.19.6
📦npmftp-srv≥ 3.0.0&&< 3.1.23.1.2npm install ftp-srv@3.1.2
📦npmftp-srv≥ 4.0.0&&< 4.3.44.3.4npm install ftp-srv@4.3.4

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ftp-srv, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update ftp-srv to 2.19.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-r4m5-47cq-6qg8 is resolved across your whole dependency graph.

  3. Workarounds

    Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.

Frequently Asked Questions

All versions of `ftp-srv` from v1.0.0 onward to v4.3.3 are vulnerable to Server-Side Request Forgery (SSRF). The package fails to prevent remote clients to access other resources in the network, for example when connecting to the server through telnet. This allows attackers to access any network resources available to the server, including private resources in the hosting environment. ## Recommendation Upgrade to patched versions `^2.19.6, ^3.1.2, ^4.3.4` ## Workarounds Blacklisting the FTP Command PORT will prevent the server from exposing this behaviour through active connections until a
O3 Security · Impact-Aware SCA

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Server-Side Request Forgery in ftp-srv