Johannes

When a TLS 1.3 client connects to a malicious server without receiving a PSK (pre shared key) extension or a KSE (key share extension), it uses a default predictable buffer for the IKM (Input Keying Material) value. This compromises the generated session master secret key, allowing an eavesdropper to reconstruct it and potentially access or meddle with message contents. The issue does not affect client validation of connected servers or expose private key information but could result in an insecure TLS 1.3 session.

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.