CVE-2023-33966: deno Improper Privilege Management

Vulnerability summary

CVE-2023-33966 is a critical (CVSS 9.8) Improper Privilege Management vulnerability in deno. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49% of scored vulnerabilities.

Timeline

1. 31-05-2023
   PublishedVulnerability first disclosed.
2. 09-01-2025
   Last modifiedVulnerability information updated.

Description

Deno is a runtime for JavaScript and TypeScript. In deno 1.34.0 and deno_runtime 0.114.0, outbound HTTP requests made using the built-in `node:http` or `node:https` modules are incorrectly not checked against the network permission allow list (`--allow-net`). Dependencies relying on these built-in modules are subject to the vulnerability too. Users of Deno versions prior to 1.34.0 are unaffected. Deno Deploy users are unaffected. This problem has been patched in Deno v1.34.1 and deno_runtime 0.114.1 and all users are recommended to update to this version. No workaround is available for this issue.

• CWE-269Improper Privilege ManagementThe product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
• CWE-276Incorrect Default PermissionsDuring installation, installed file permissions are set to allow anyone to modify those files.