For an example, see this summary of the baseline for warranties in the EU
http://europa.eu/youreurope/citizens/shopping/shopping-abroa...
I suppose the reason why the software industry gets around this is that you can't buy software but only license it.
AFAIK, as a consumer, you cannot sign away these rights for physical products. For software, which you license, i.e. acquire usage rights, the situation seems to be different.
[1]: http://opensource.org/licenses/MIT
[2]: http://opensource.org/licenses/BSD-3-Clause