netlify-ipx up to 1.2.2 on Netlify Allowlist cross site scripting

Summaryinfo

A vulnerability classified as problematic was found in netlify-ipx up to 1.2.2 on Netlify. Affected is an unknown function of the component Allowlist Handler. Such manipulation leads to cross site scripting. This vulnerability is traded as CVE-2022-39239. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in netlify-ipx up to 1.2.2 on Netlify. It has been rated as problematic. Affected by this issue is an unknown function of the component Allowlist Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

netlify-ipx is an on-Demand image optimization for Netlify using ipx. In versions prior to 1.2.3, an attacker can bypass the source image domain allowlist by sending specially crafted headers, causing the handler to load and return arbitrary images. Because the response is cached globally, this image will then be served to visitors without requiring those headers to be set. XSS can be achieved by requesting a malicious SVG with embedded scripts, which would then be served from the site domain. Note that this does not apply to images loaded in `<img>` tags, as scripts do not execute in this context. The image URL can be set in the header independently of the request URL, meaning any site images that have not previously been cached can have their cache poisoned. This problem has been fixed in version 1.2.3. As a workaround, cached content can be cleared by re-deploying the site.

The weakness was shared 09/23/2022 as GHSA-9jjv-524m-jm98. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2022-39239 since 09/02/2022. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 1.2.3 eliminates this vulnerability.

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Productinfo

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• netlify-ipx

Version

• 1.2.0
• 1.2.1
• 1.2.2

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CPE 2.2info

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