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WP Trackback Spam Attack

Abe Olandres Editor-in-chief April 9, 2008 · 2 min read

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Insakan a mas popularno, mas dagiti serbang a maawat. Daytoy ket saan laeng a naggapuan iti WordPress ita a tiempo. Dagiti napigsa a code injection ken nakaited a tulong iti WordPress blogs ket agtultuloy a mangpababa, ken idi rabii met laeng, nadakamatko ti sabali a porma a serbang -- ti WP Trackback Spam flooding.

Ti serrek ket simpleng ngem epektibo -- bingayen ti wp-trackback.php iti HTTP nga pagsasaruno. Kasla DDOS met laeng daytoy. Maysa a maraman a paraan ti makapagpabassit:

Naipangato babaen ti software. Nakitaak dagiti sumagmamano a softwares a makapagkumpleto iti 1,000 a simultaneous nga HTTP a panangpangruna iti maysa a site wenno specific a webpage.
Code embed. Idaddaen ti target a page (kasla daytoy, wp-trackback.php) iti maysa a popular a page wenno site a mangipangruna kadakami iti tunggal panag-load. Replicaren dayta kadagiti adu pay a high-traffic a sites ken viola, instant slashdot effect.
Bots. Kasla ti GoogleBot wenno Yahoo! Metacrawler ngem dagitoy a sebbangan ket addaan laeng iti malicious a pagsapulan a mangpangruna kadagiti specific a page -- wp-trackback.php.

Napudno daytoy. Nangrugiak ti 6 nga oras a mangmonitor iti maysa kadagiti serbidormi a naatackan ti blog. Kasla Digg-effect wenno slashdot effect ti atake. Ngem, adda dagiti solusion a saan a makapigsa — no WP-SuperCache met laeng, saanna a maipigsa daytoy. Kalpasanna, nagtultulokak, babaen ta babaen ti pagkaykayatna nga awan ti cache ti panid.

Maysa a panid iti analytics ket makita daytoy:

wordpress trackback

Pinagtrabaho daytoy ti WP-Shortstats. Ribuan dagiti request para kadagiti trackback para amin a panid iti blog iti maysa a oras.

Agas pay laeng ti situasion no ti wp-shortstats plugin ket mangrekord met daytoy -- aya, para kadagiti bannat ti bawat panangipakita ti page, adda maysa a SQL query nga ineksikutaan babaen ti Shortstats a mangpabassit iti situasion.

Ti resulta -- mababa a blog a mangkaykay; iti pasetna, napuno wenno mapukaw a server.

Ti solusion? Ti panagdeactivate kadagiti trackbacks ayaw a makatulong. Kailanganmo nga i-delete ti wp-trackback.php wenno CHMOD daytoy iti 000. No maitedmo ti IP, ipablaakda met laeng.

Dia sa blogmo ket saan a makapagpadagan/agawen dagiti legit a trackback ngem daytoy ti tunggal solusion para iti nasapa.

What is a WP Trackback Spam attack?

It floods wp-trackback.php with HTTP requests, similar to a DDOS attack.

Why did WP-SuperCache fail to stop the attack?

The trackback page was not being cached, so caching solutions could not fend it off.

How did the wp-shortstats plugin worsen the attack?

It recorded each trackback request, adding extra server load for every page request.

React to this article:

attack flood hack pingback spam trackback

Abe Olandres

Editor-in-chief

Abe is the founder and Editor-in-Chief of YugaTech with over 20 years of experience in the technology industry. He is one of the pioneers of blogging in the country and is considered by many as the Father of Tech Blogging in the Philippines.

8,012 Articles

View all posts by Abe Olandres →

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Bernhard · 17 years ago

After using WP-reCAPTCHA I’ve minized the numbers of SPAM. Still remaining trackbacks – sometimes hundreds per day.

Deleting those trackbacks could be simple. But you have to differentiate: there are trackbacks coming form websides you would like to discuss with, there are trackbacks from pharmacy and sex you begin to hate.

I would like to know a tool you add the IP address and a trackback of this IP will no longer be shown.

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Showbiz Intriga? Get It From Boy! · 18 years ago

OMG! i believe this is culprit, that’s why last month my host server to crash several times and my blog too..

CHMOD to 000?is it just like deleting the wp.trackback thing??

SELaplana · 18 years ago

i don’t know if my selaplana.com experience this. i tried to investigate but i don’t know yet how to know if the blog has been attacked by this kind.

ash · 18 years ago

oh!.. still great it’s fixed… thanks.

Abe Olandres Editor-in-chief · 18 years ago

@ash, that’s the only way I was able to detect the attack. caused the server to slow down and crash at times. Looks like your blog is on that server too.