Shoot, no patch for the 1.2.x series? That's disappointing. It's not that old, is it? I feel like I upgraded to 1.2.x, which was then the newest stable branch, just over a year ago.
Debian does commit to security support for packages in main, i expect they will backport the patch to their current version and send notification from security-announce when an update is released. Also keep an eye on https://security-tracker.debian.org/tracker/CVE-2013-4547
As I know, 1.2.x actually is obsoleted since May 2013, and there is no more support or bugfixes after this date.