CVE-2023-33966 Deno missing "--allow-net" permission check for built-in Node modules

What is CVE-2023-33966?

CVE-2023-33966 is a high-severity vulnerability in denoland deno, published on 31 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-276, CWE-269

Which versions are affected by CVE-2023-33966?

4 open source packages ship an affected version, including deno and deno_runtime. It affects 2 products.

Products include Deno Deno, Deno Deno Runtime.

How do I fix CVE-2023-33966?

Upgrade deno to 1.34.1 or later.

Is CVE-2023-33966 being exploited?

There is no known exploitation of CVE-2023-33966 in the wild and no public exploit code.

Other vulnerabilities in denoland deno

• CVE-2023-28445 Deno improperly handles resizable ArrayBuffer Critical 10.0
• CVE-2022-24783 Sandbox bypass leading to arbitrary code execution in Deno Critical 10.0
• CVE-2021-32619 Static imports inside dynamically imported modules do not adhere to permission checks Critical 9.8
• CVE-2026-22863 Deno node:crypto doesn't finalize cipher Critical 9.2
• CVE-2024-27936 Deno interactive permission prompt spoofing via improper ANSI stripping High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-vc52-gwm3-8v2f.