Ubuntu Security Notice 1400-4 - USN-1400-3 fixed vulnerabilities in Thunderbird. The new Thunderbird version caused a regression in IMAP connections and mail filtering. This update fixes the problem. Soroush Dalili discovered that Firefox did not adequately protect against dropping JavaScript links onto a frame. Atte Kettunen discovered a use-after-free vulnerability in Firefox's handling of SVG animations. Various other issues were also addressed.
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