Update dependency rollup to v2.79.2 [SECURITY] #453
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This PR contains the following updates:
2.79.1->2.79.2GitHub Vulnerability Alerts
CVE-2024-47068
Summary
We discovered a DOM Clobbering vulnerability in rollup when bundling scripts that use
import.meta.urlor with plugins that emit and reference asset files from code incjs/umd/iifeformat. The DOM Clobbering gadget can lead to cross-site scripting (XSS) in web pages where scriptless attacker-controlled HTML elements (e.g., animgtag with an unsanitizednameattribute) are present.It's worth noting that we’ve identifed similar issues in other popular bundlers like Webpack (CVE-2024-43788), which might serve as a good reference.
Details
Backgrounds
DOM Clobbering is a type of code-reuse attack where the attacker first embeds a piece of non-script, seemingly benign HTML markups in the webpage (e.g. through a post or comment) and leverages the gadgets (pieces of js code) living in the existing javascript code to transform it into executable code. More for information about DOM Clobbering, here are some references:
[1] https://scnps.co/papers/sp23_domclob.pdf
[2] https://research.securitum.com/xss-in-amp4email-dom-clobbering/
Gadget found in
rollupWe have identified a DOM Clobbering vulnerability in
rollupbundled scripts, particularly when the scripts usesimport.metaand set output in format ofcjs/umd/iife. In such cases,rollupreplaces meta property with the URL retrieved fromdocument.currentScript.https://github.com/rollup/rollup/blob/b86ffd776cfa906573d36c3f019316d02445d9ef/src/ast/nodes/MetaProperty.ts#L157-L162
https://github.com/rollup/rollup/blob/b86ffd776cfa906573d36c3f019316d02445d9ef/src/ast/nodes/MetaProperty.ts#L180-L185
However, this implementation is vulnerable to a DOM Clobbering attack. The
document.currentScriptlookup can be shadowed by an attacker via the browser's named DOM tree element access mechanism. This manipulation allows an attacker to replace the intended script element with a malicious HTML element. When this happens, thesrcattribute of the attacker-controlled element (e.g., animgtag ) is used as the URL for importing scripts, potentially leading to the dynamic loading of scripts from an attacker-controlled server.PoC
Considering a website that contains the following
main.jsscript, the devloper decides to use therollupto bundle up the program:rollup main.js --format cjs --file bundle.js.The output
bundle.jsis shown in the following code snippet.Adding the
rollupbundled script,bundle.js, as part of the web page source code, the page could load theextra.jsfile from the attacker's domain,attacker.controlled.serverdue to the introduced gadget during bundling. The attacker only needs to insert animgtag with the name attribute set tocurrentScript. This can be done through a website's feature that allows users to embed certain script-less HTML (e.g., markdown renderers, web email clients, forums) or via an HTML injection vulnerability in third-party JavaScript loaded on the page.Impact
This vulnerability can result in cross-site scripting (XSS) attacks on websites that include rollup-bundled files (configured with an output format of
cjs,iife, orumdand useimport.meta) and allow users to inject certain scriptless HTML tags without properly sanitizing thenameoridattributes.Patch
Patching the following two functions with type checking would be effective mitigations against DOM Clobbering attack.
Release Notes
rollup/rollup (rollup)
v2.79.2Compare Source
Configuration
📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).
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