The V8 inspector intentionally allows arbitrary code execution within the Workers sandbox for debugging. wrangler dev would previously start an inspector server listening on all network interfaces. This would allow an attacker on the local network to connect to the inspector and run arbitrary code. Additionally, the inspector server did not validate Origin/Host headers, granting an attacker that can trick any user on the local network into opening a malicious website the ability to run code. If wrangler dev --remote was being used, an attacker could access production resources if they were bound to the worker. This issue was fixed in wrangler@3.19.0 and wrangler@2.20.2. Whilst wrangler dev's inspector server listens on local interfaces by default as of wrangler@3.16.0, an SSRF vulnerability in miniflare https://github.com/cloudflare/workers-sdk/security/advisories/GHSA-fwvg-2739-22v7  (CVE-2023-7078) allowed access from the local network until wrangler@3.18.0. wrangler@3.19.0 and wrangler@2.20.2 introduced validation for the Origin/Host headers.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: cloudflare

Published: 2023-12-29T11:58:36.214Z

Updated: 2023-12-29T12:08:25.935Z

Reserved: 2023-12-22T09:59:52.954Z


Link: CVE-2023-7080

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2023-12-29T12:15:47.970

Modified: 2024-01-05T18:09:24.273


Link: CVE-2023-7080

JSON object: View

cve-icon Redhat Information

No data.