thunderbird: multiple issues

• CVE-2015-0801 (same-origin bypass):

Mozilla developer Olli Pettay reported that while investigating Mozilla
Foundation Security Advisory 2015-28, he and Mozilla developer Boris
Zbarsky found an alternate way to trigger a similar vulnerability. The
previously reported flaw used an issue with SVG content navigation to
bypass same-origin policy protections to run scripts in a privileged
context. This newer variant found that the same flaw could be used
during anchor navigation of a page, allowing bypassing of same-origin
policy protections.

• CVE-2015-0807 (CORS requests should not follow 30x redirections after
  preflight):

Mozilla developer Christoph Kerschbaumer discovered an issue while
investigating Mozilla Foundation Security Advisory 2015-03, previously
reported by security researcher Muneaki Nishimura. This flaw was that a
cross-origin resource sharing (CORS) request should not follow 30x
redirections after preflight according to the specification. This only
affects sendBeacon() requests but could allow for a potential Cross-site
request forgery (XSRF) attack from malicious websites.

• CVE-2015-0813 (use-after-free):

Security researcher Aki Helin reported a use-after-free when playing
certain MP3 format audio files on the web using the Fluendo MP3 plugin
for GStreamer on Linux. This is due to a flaw in handling certain MP3
files by the plugin and its interaction with Mozilla code. This can lead
to a potentially exploitable crash.

• CVE-2015-0815 (memory safety issues):

Mozilla developers and community identified and fixed several memory
safety bugs in the browser engine used in Firefox and other
Mozilla-based products. Some of these bugs showed evidence of memory
corruption under certain circumstances, and we presume that with enough
effort at least some of these could be exploited to run arbitrary code.

• CVE-2015-0816 (privilege escalation):

Security researcher Mariusz Mlynski reported, through HP Zero Day
Initiative’s Pwn2Own contest, that documents loaded though a resource:
URL, such as Mozilla’s PDF.js PDF file viewer, were able to subsequently
load privileged chrome pages. The privilege restrictions on resource:
URLs was handled incorrectly and these restrictions could be bypassed if
this flaw was combined with a separate vulnerability allowing for
same-origin policy violation, it could be used to run arbitrary code.