Gentoo Linux Security Advisory 201512-10 - Multiple vulnerabilities have been found in Mozilla Firefox and Thunderbird, the worst of which may allow user-assisted execution of arbitrary code. Versions less than 38.5.0 are affected.
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Ubuntu Security Notice 2571-1 - Robert Kaiser discovered a use-after-free during plugin initialization in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the privileges of the user invoking Firefox.
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