Ubuntu Security Notice 6782-1 - Multiple security issues were discovered in Thunderbird. If a user were tricked into opening a specially crafted website in a browsing context, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information, bypass security restrictions, cross-site tracing, or execute arbitrary code. Thomas Rinsma discovered that Thunderbird did not properly handle type check when handling fonts in PDF.js. An attacker could potentially exploit this issue to execute arbitrary javascript code in PDF.js.
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Ubuntu Security Notice 6779-1 - Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. Jan-Ivar Bruaroey discovered that Firefox did not properly manage memory when audio input connected with multiple consumers. An attacker could potentially exploit this issue to cause a denial of service, or execute arbitrary code.
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Debian Linux Security Advisory 5691-1 - Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code or clickjacking.
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