Vulnerability · Published Mar 6, 2024 · Assigned by GitHub_M
CVE-2024-27933Deno arbitrary file descriptor close via `op_node_ipc_pipe()` leading to permission prompt bypass
High 8.3
In plain English
A high-severity incorrect authorization in deno from denoland. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities).
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.
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/denoland/deno/security/advisories/GHSA-6q4w-9x56-rmwq x_refsource_CONFIRM
- https://github.com/denoland/deno/commit/55fac9f5ead6d30996400e8597c969b675c5a22b x_refsource_MISC
- https://github.com/denoland/deno/commit/5a91a065b882215dde209baf626247e54c21a392 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L214 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L220 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L225 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L241 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L256 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L265 x_refsource_MISC
- https://github.com/denoland/deno/blob/v1.39.0/runtime/permissions/prompter.rs#L99 x_refsource_MISC