Wrangler Inspector Server Code Exec, fixed v3.19
CVE-2023-7080 Published on December 29, 2023

Arbitrary remote code execution within wrangler dev Workers sandbox
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.

Github Repository NVD

Vulnerability Analysis

Attack Vector:
ADJACENT_NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
REQUIRED
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
NONE

Weakness Type

Improper Privilege Management

The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.


Products Associated with CVE-2023-7080

Want to know whenever a new CVE is published for CloudFlare Wrangler? stack.watch will email you.

CloudFlare Wrangler
 

Affected Versions

Cloudflare wrangler:

Vulnerable Packages

The following package name and versions may be associated with CVE-2023-7080

Package Manager Vulnerable Package Versions Fixed In
npm wrangler >= 3.0.0, < 3.19.0 3.19.0
npm wrangler >= 2.0.0, < 2.20.2 2.20.2

Exploit Probability

EPSS
0.58%
Percentile
43.25%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.