Package origin not showing *-security

[mrvanes]

I use apt-show-versions to decide if I have to flag an alert in my monitoring system for pending security updates. On nearly all of my installs this succeed, except for two: they show the update's origin to be "precise" instead of "precise-security" and thus don't trigger an alert when grep'ing for "security" in apt-show-version's output:

#!/bin/sh
apt-show-versions -u | grep security | wc -l

I can't seem to find any difference in the apt setup of those machines. They all have the same (default) repositories listed, in the same order.

When looking through aptitude on the misbehaving machines, it clearly shows security updates are pending, so they really should have triggered.

[mrvanes (mrvanes)]

For those stumbling upon this bug for the same reason, I found an elegant work-around:
aptitude search '?and(~U,~Asecurity)' | wc -l