icedove - security update

Multiple security issues have been found in Icedove, Debian’s version of
the Mozilla Thunderbird mail client: Multiple memory safety errors,
same-origin policy bypass issues, integer overflows, buffer overflows
and use-after-frees may lead to the execution of arbitrary code or
denial of service.

For the stable distribution (jessie), these problems have been fixed in
version 1:45.5.1-1~deb8u1.

For the unstable distribution (sid), these problems have been fixed in
version 1:45.5.1-1 or earlier.

We recommend that you upgrade your icedove packages.