CVE-2024-27933 Deno arbitrary file descriptor close via `op_node_ipc_pipe()` leading to permission prompt bypass
Attackers can bypass Deno permission prompts by closing standard input via IPC, enabling arbitrary code execution on the host.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-27933?
CVE-2024-27933 is a high-severity vulnerability in denoland deno, published on 6 Mar 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Deno is a JavaScript, TypeScript, and WebAssembly runtime. In version 1.39.0, use of raw file descriptors in `op_node_ipc_pipe()` leads to premature close of arbitrary file descriptors, allowing standard input to be re-opened as a different resource resulting in permission prompt bypass. Node child_process IPC relies on the JS side to pass the raw IPC file descriptor to `op_node_ipc_pipe()`, which returns a `IpcJsonStreamResource` ID associated with the file descriptor. On closing the resource, the raw file descriptor is closed together.
Use of raw file descriptors in `op_node_ipc_pipe()` leads to premature close of arbitrary file descriptors. This allow standard input (fd 0) to be closed and re-opened for a different resource, which allows a silent permission prompt bypass. This is exploitable by an attacker controlling the code executed inside a Deno runtime to obtain arbitrary code execution on the host machine regardless of permissions.
This bug is known to be exploitable. There is a working exploit that achieves arbitrary code execution by bypassing prompts from zero permissions, additionally abusing the fact that Cache API lacks filesystem permission checks. The attack can be conducted silently as stderr can also be closed, suppressing all prompt outputs.
Version 1.39.1 fixes the bug.
Weakness: CWE-863
Which versions are affected by CVE-2024-27933?
2 open source packages ship an affected version, including deno. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
deno crates.io | From 1.39.0 | 1.39.1 |
deno crates.io | From 1.39.0 | 1.39.1 |
Products include Deno Deno.
How do I fix CVE-2024-27933?
Upgrade deno to 1.39.1 or later.
Is CVE-2024-27933 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-27933 exists.
Other vulnerabilities in denoland deno
- CVE-2023-28445 Deno improperly handles resizable ArrayBuffer
- CVE-2022-24783 Sandbox bypass leading to arbitrary code execution in Deno
- CVE-2021-32619 Static imports inside dynamically imported modules do not adhere to permission checks
- CVE-2026-22863 Deno node:crypto doesn't finalize cipher
- CVE-2024-27936 Deno interactive permission prompt spoofing via improper ANSI stripping
Sources
Also known as GHSA-6q4w-9x56-rmwq.