Debian: DSA-2588-1 Critical: Icedove Email Client Remote Attacks

Multiple vulnerabilities have been found in Icedove, Debian's version
of the Mozilla Thunderbird mail and news client.

CVE-2012-4201
The evalInSandbox implementation uses an incorrect context during
the handling of JavaScript code that sets the location.href
property, which allows remote attackers to conduct cross-site
scripting (XSS) attacks or read arbitrary files by leveraging a
sandboxed add-on.

CVE-2012-4207
The HZ-GB-2312 character-set implementation does not properly handle
a ~ (tilde) character in proximity to a chunk delimiter, which
allows remote attackers to conduct cross-site scripting (XSS)
attacks via a crafted document.

CVE-2012-4216
Use-after-free vulnerability in the gfxFont::GetFontEntry function
allows remote attackers to execute arbitrary code or cause a denial
of service (heap memory corruption) via unspecified vectors.

CVE-2012-5829
Heap-based buffer overflow in the nsWindow::OnExposeEvent function could
allow remote attackers to execute arbitrary code.

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