Ubuntu Security Notice 4045-1 - A type confusion bug was discovered in Thunderbird. If a user were tricked in to opening a specially crafted website in a browsing context, an attacker could exploit this by causing a denial of service, or executing arbitrary code. It was discovered that a sandboxed child process could open arbitrary web content in the parent process via the Prompt:Open IPC message. When combined with another vulnerability, an attacker could potentially exploit this to execute arbitrary code. Various other issues were also addressed.
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