Mozilla Firefox Service Worker cross-domain policy

Summaryinfo

A vulnerability categorized as critical has been discovered in Mozilla Firefox. Affected by this issue is some unknown functionality of the component Service Worker. Such manipulation leads to cross-domain policy. This vulnerability is uniquely identified as CVE-2022-45403. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox (Web Browser) (affected version unknown). It has been rated as critical. Affected by this issue is an unknown functionality of the component Service Worker. The manipulation with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Service Workers should not be able to infer information about opaque cross-origin responses; but timing information for cross-origin media combined with Range requests might have allowed them to determine the presence or length of a media file. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

The weakness was disclosed 12/23/2022. The advisory is available at mozilla.org. This vulnerability is handled as CVE-2022-45403 since 11/14/2022. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/10/2025).

The vulnerability scanner Nessus provides a plugin with the ID 246938 (Linux Distros Unpatched Vulnerability : CVE-2022-45403), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at mozilla.org.

The vulnerability is also documented in the vulnerability database at Tenable (246938). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Web Browser

Vendor

• Mozilla

Name

• Firefox

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

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• 🔍

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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