SVG Loader up to 1.6.8 Event Attribute cross site scripting

Summaryinfo

A vulnerability was found in SVG Loader up to 1.6.8. It has been rated as problematic. Affected is an unknown function of the component Event Attribute Handler. This manipulation causes cross site scripting. This vulnerability is handled as CVE-2023-40013. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in SVG Loader up to 1.6.8 and classified as problematic. Affected by this vulnerability is an unknown function of the component Event Attribute Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

SVG Loader is a javascript library that fetches SVGs using XMLHttpRequests and injects the SVG code in the tag's place. According to the docs, 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 Cross-site Scripting (XSS). When trying to sanitize the svg the lib removes event attributes such as `onmouseover`, `onclick` but the list of events is not exhaustive. 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. This issue has been addressed in commit `d3562fc08` which is included in releases from 1.6.9. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The weakness was released 08/15/2023 as GHSA-xc2r-jf2x-gjr8. The advisory is shared at github.com. This vulnerability is known as CVE-2023-40013 since 08/08/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 1.6.9 eliminates this vulnerability. Applying the patch d3562fc08497aec5f33eb82017fa1417b3319e2c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• SVG Loader

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8

License

• open-source

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CPE 2.2info

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