CVE-2023-40013

描述

### Summary According to the [docs](https://github.com/shubhamjain/svg-loader/tree/main#2-enable-javascript), svg-loader will strip all JS code before injecting the SVG file for security reasons but the input sanitization logic is not sufficient and can be trivially bypassed. This allows an attacker to craft a malicious SVG which can result in XSS. ### Details When trying to sanitize the svg the lib [removes event attributes](https://github.com/shubhamjain/svg-loader/blob/main/svg-loader.js#L125-L128) such as `onmouseover`, `onclick` but the list of events is not exhaustive. Here's a list of events not removed by svg-loader. `onafterscriptexecute, onbeforecopy, onbeforecut, onbeforescriptexecute, onbeforetoggle, onbegin, onbounce, onend, onfinish, onfocusin, onfocusout, onmousewheel, onpointerrawupdate, onrepeat, onsearch, onshow, onstart, ontoggle(popover), ontouchend, ontouchmove, ontouchstart` As you can see in the POC we can use `onbegin` in `animate` tag to execute JS code without needing to add `data-js="enabled"`. ### PoC ```html <svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg"> <animate onbegin=alert(1) attributeName=x dur=1s> </svg> ``` ```html <html> <head> <script src="./dist/svg-loader.js" type="text/javascript"></script> </head> <body> <svg data-src="data:image/svg+xml;base64,PHN2ZyB2ZXJzaW9uPSIxLjEiIGJhc2VQcm9maWxlPSJmdWxsIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPgogIDxwb2x5Z29uIGlkPSJ0cmlhbmdsZSIgcG9pbnRzPSIwLDAgMCw1MCA1MCwwIiBmaWxsPSIjMDA5OTAwIiBzdHJva2U9IiMwMDQ0MDAiLz4KICA8YW5pbWF0ZSBvbmJlZ2luPWFsZXJ0KDEpIGF0dHJpYnV0ZU5hbWU9eCBkdXI9MXM+Cjwvc3ZnPgo="></svg> </body> </html> ``` ### Impact Any website which uses external-svg-loader and allows its users to provide svg src, upload svg files would be susceptible to stored XSS attack.

如何修補 CVE-2023-40013

要修補 CVE-2023-40013,請將受影響套件升級到下列已修補版本。

—升級至 1.6.9 或更新版本

CVE-2023-40013 正在被利用嗎?

低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。

描述

如何修補 CVE-2023-40013

CVE-2023-40013 正在被利用嗎?

受影響套件(1)

CVSS 分數

參考連結(6)