Author's Opinion

The views in this column are those of the author and do not necessarily reflect the views of iTWire.

Have your say and comment below.

Tuesday, 12 January 2010 04:15

The 2010 bug that isn't

By
When is a bug not a bug? No, that's not a riddle, but there is a big difference between a design or coding flaw and an inappropriate configuration.

There have been various reports of 2010 bugs surfacing when the new year arrived.

The highest profile incidents have been those involving EFTPOS machines in Australia and elsewhere. There's no question that this wasn't a real - and serious - bug.

Also coming in for significant attention was an alleged 2010 bug in the SpamAssassin 3.2.x spam filter.

One of the ways SpamAssassin determines the spaminess of a particular message is to check its date. If it's too far into the future, the assumption is that the message is likely to be spam.

While a message apparently from the relatively distant past is possible (typically due to a dead battery in the sending hardware combined with disabled network time setting), messages apparently from the future are generally engineered that way so they are forced to the top of the receiver's inbox.

SpamAssassin's behaviour is controlled by a configuration file, and one of the rules controls the threshold year used in calculating a messages spam score.

Up until the end of 2009, that threshold year was 2010. On January 1, a replacement rule was pushed out to installations using sa-update (Spam Assassin Update).

That was least a day late, and admins in parts of the world where it is customary to take time off between Christmas and New Year would likely wish it had appeared at least a month eariler.

Not everyone uses sa-update, so some manual configuration was required. (That also went for Mac OS X Server admins - it seems Apple did not push out the new rule via Software Update.)

The rule had already been changed in SpamAssassin 3.3.x.

Bug or not a bug - see my argument on page 2, then leave a comment with your opinion on the matter.


But the question is, was this a bug?

Even though the SpamAssassin project referred to the "Y2K10 Rule Bug" (and doesn't that mean the year 21000000000 - 2.1 x 10^10 - rather than 2010?), I'm not convinced.

You can argue that there is a bug in the program's design in that it should use a certain number of years into the future rather than an absolute year as the threshold, but that's a different matter.

It's not that SpamAssassin couldn't cope with dates falling in or after a certain year, which was at the root of the EFTPOS problem.

Analogies are always tricky, but it's a bit like using an address book program to manage your Christmas card list, and then complaining that one of the labels is wrong because you didn't enter a friend's change of address.

If you think the SpamAssassin issue really was a bug, here's an advance warning for you: SpamAssassin now either has a bug in that it no longer uses future dates as an indicator of spaminess, or has a 'Y2K20 bug' if you use a rule like the one suggested by Apple .

Some SpamAssassin users suggest that checking for future dates does nothing to improve the accuracy of filtering so it might as well be deleted entirely. They say that while virtually all messages with distant-future dates are spam, those same messages are detected by other rules.


Subscribe to ITWIRE UPDATE Newsletter here

GRAND OPENING OF THE ITWIRE SHOP

The much awaited iTWire Shop is now open to our readers.

Visit the iTWire Shop, a leading destination for stylish accessories, gear & gadgets, lifestyle products and everyday portable office essentials, drones, zoom lenses for smartphones, software and online training.

PLUS Big Brands include: Apple, Lenovo, LG, Samsung, Sennheiser and many more.

Products available for any country.

We hope you enjoy and find value in the much anticipated iTWire Shop.

ENTER THE SHOP NOW!

INTRODUCING ITWIRE TV

iTWire TV offers a unique value to the Tech Sector by providing a range of video interviews, news, views and reviews, and also provides the opportunity for vendors to promote your company and your marketing messages.

We work with you to develop the message and conduct the interview or product review in a safe and collaborative way. Unlike other Tech YouTube channels, we create a story around your message and post that on the homepage of ITWire, linking to your message.

In addition, your interview post message can be displayed in up to 7 different post displays on our the iTWire.com site to drive traffic and readers to your video content and downloads. This can be a significant Lead Generation opportunity for your business.

We also provide 3 videos in one recording/sitting if you require so that you have a series of videos to promote to your customers. Your sales team can add your emails to sales collateral and to the footer of their sales and marketing emails.

See the latest in Tech News, Views, Interviews, Reviews, Product Promos and Events. Plus funny videos from our readers and customers.

SEE WHAT'S ON ITWIRE TV NOW!

BACK TO HOME PAGE
Stephen Withers

Stephen Withers is one of Australia¹s most experienced IT journalists, having begun his career in the days of 8-bit 'microcomputers'. He covers the gamut from gadgets to enterprise systems. In previous lives he has been an academic, a systems programmer, an IT support manager, and an online services manager. Stephen holds an honours degree in Management Sciences and a PhD in Industrial and Business Studies.

Share News tips for the iTWire Journalists? Your tip will be anonymous

WEBINARS ONLINE & ON-DEMAND

GUEST ARTICLES

VENDOR NEWS

Guest Opinion

Guest Interviews

Guest Reviews

Guest Research

Guest Research & Case Studies

Channel News

Comments