Giorgio Maone

The issue arises from incorrect origin serialization of URLs with IPv6 addresses, potentially leading to incorrect security checks.

Documents formed using data: URLs in an OBJECT element failed to inherit the Content Security Policy (CSP) of the creating context. This allowed the execution of scripts that should have been blocked, albeit with a unique opaque origin.

The issue is related to an integer overflow in the `xml utf8 decode` function, which can be exploited by remote attackers using a crafted string with overlong UTF-8 encoding. This allows attackers to bypass protection mechanisms against cross-site scripting (XSS) and SQL injection.

Name of the Vulnerable Software and Affected Versions: Firefox version 1.0.3 Description: The issue allows remote attackers to execute arbitrary Javascript in other domains. This is achieved by using an IFRAME and causing the browser to navigate to a previous javascript: URL, which can lead to arbitrary code execution. Recommendations: For Firefox version 1.0.3, update to a newer version to mitigate the risk.

Name of the Vulnerable Software and Affected Versions: Firefox version 1.0.3 Description: The issue allows remote web sites on the browser's whitelist to execute arbitrary Javascript with chrome privileges. This can lead to arbitrary code execution on the system when combined with other vulnerabilities. The exploitation can be demonstrated using a javascript: URL as the package icon and a cross-site scripting (XSS) attack on a vulnerable whitelist site. Recommendations: For Firefox version 1.0.3, consider restricting access to the `install` function until a patch is available. As a temporary workaround, avoid using the `javascript:` URL scheme for package icons to minimize the risk of exploitation.