I’m driving through Europe for the next week so am not very available online. Currently in awesome Andorra. So if I’m not very responsive to your WordPress security needs I apologize. However, I have been working on a permanent fix to help with the recent spate of WP hacks and will be making it available as soon as I’m back at work. So apologies for the delay and thanks for your patience.
Author: mark
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Blogspot security hole lets others view unpublished blog entries
If you use the “new” Blogspot interface, try saving a draft post and then previewing it. You’ll see you’re previewing it using a link that looks something like:
http://example.blogspot.com/b/post-preview?token=<long-encoded-string>&postId=532662776851272&type=POST
One would assume that Blogspot knows you are “you” because you are signed in to Blogspot and it identifies you using a cookie. So it shouldn’t be possible for anyone else on the Net to view your unpublished blog post right? Wrong.
If anyone else sees that link with the token, they simply paste it into their browser and they can view your unpublished blog entry.
I thought that this would present a problem if you’re previewing a blog entry and you click an external link you included in your blog post. This would send your “preview” URL to that external site as a referrer, which means that external site can access your unpublished blog entry. Google seem to have anticipated this and they prevent you from clicking anything on the page by putting a DOM overlay on the preview page.
However, all widgets on the page load. That means if you’re using a Facebook Like button, a stats widget, popular pages widget or any other external javascript widget that logs the current URL (pretty much all of them) then those external sites can access your unpublished blog entry. More importantly anyone who those external sites share the URL with can access your unpublished blog entry.
I thought perhaps if I logged out of Blogspot, that security token would expire and no one would be able to access my unpublished blog entry. Nope. It’s still accessible.
Providing security through the hope that no one will discover a hidden URL in a world where URL sharing has become a deep part of everything we do is not a good design. Blogspot team please fix this. Thanks.
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A peek into our Space Intelligence Community
I spent the day in a secure area on Buckley Air Force Base called ADF-C or Air Force Data Facility, Colorado. A relative of mine works there and I got an invite to a family day, which I thought was impressive so I thought I’d share some of what I saw.
Walking into ADF-C we had to leave all cellphones, cameras and electronic devices behind and produce two forms of ID to get in. Once inside, there were a wide variety of military personell mixing with civilian contractors. What has surprised me about Buckley on previous visits and again today is the international presence including Canadian and Australian military personell.
The base colonel did an impressive speech on opsec and the importance of the work done on Buckley including the sacrifice families in secure jobs make. “Hi Honey, what did you do at work today?”. “Oh nothing.”. Most families I know, including my own immediate family, talk passionately about our jobs among each other, debate decisions we made, discuss colleagues and work events and so on. Families in secure jobs, including many of my extended family, can never discuss things they work on now or worked on many decades ago. This includes military contractors. Maintaining that discipline is an impressive sacrifice that I don’t think many people appreciate.
Walking into the base, there were many areas we could not access. But they had put together an impressive display for us. The first desk absolutely blew me away. The National Geospatial-Intelligence Agency is based at Buckely. I’ve been using their data for years and recommending it to others and I walked up to the young sergeant behind the desk and literally shook the guys hand and thanked him for the awesome data they make available to the public. Any online business, world-wide, that provides a city or point of interest radius search, uses the NGA’s data and probably dont’ even realize it.
Next up was AGI that makes software to track objects in orbit. The demo they had up was impressive, tracking items in low and medium earth orbits in real-time. The guy was telling me they provide API’s in .NET and Java for developers and as I was listening I looked over my shoulder and totally lost interest because….
The National Security Agency had a booth there. My wife and I immediately headed over and the three people behind the desk were incredibly friendly and forthcoming about their work. But the real treat was that they had a working original enigma encryption machine from WWII. The engima created the strong awareness of the importance of cryptography we have today and it’s one of the main reasons the NSA exists today. Most of the folks behind the desk were mathematicians or worked with, or are married to mathematicians. They have a presence on Buckley and they told us that post 9/11 they diversified beyond Fort Meade (Maryland).
Next up was the National Reconnaissance Office or NRO. These are the guys who actually launch and operate the spy satellites that the NSA and other agencies use. I picked up these cool postcards of a few of the 2010 and 2011 launches they’ve done:
I also chatted to folks from a software division in Lockheed that have designed a 3D walkthrough app that uses real-world photography taken from a reconnaissance aircraft to create a model of an environment. Imagine a Quake walkthrough game of Vegas with actual footage taken at an instant in time of the city. That’s what they had on a demo system. It’s designed to take battlefield intel and provide a walkthrough for folks planning an operation.
We went back to the NSA booth later to play with that enigma some more. It has 3 sets of numbers that are synchronized when two machines are together. Then before a transmission is sent, the sending station will broadcast how much the receiver needs to increment their machine’s numbers by in order to receive the code. The NSA person I spoke to told me that was one of the weaknesses that helped the Polish cryptanalysts (and then Blechley Park) crack the code. That transmission containing the increments always contained no data.
Next up, we took a tour of one of the base radome’s, but on the way I spotted an interesting plaque on a wall in the hallway. It said “Echelon” with a coat of arms and the slogan “Acta Non Verba”. I went back and did a double-take. One the way back I did a triple take. Some amazing history there if you know anything about signals intelligence.
I always thought those Radome’s contained radar systems for local aircraft, considering it’s an Air Force base. But they contain 85 ft diameter satellite dishes that weigh almost 200 tons and rotate at 2 degrees per second when they’re moving. The dome’s are constructed out of a material that seems similar to mylar (main sail material) and are kept at a positive pressure to strengthen them. They can handle winds up to 125mph. If you live in Colorado you’ll know they dot the landscape for hundreds of miles in the Denver and Colorado Springs areas.
I chatted to a bomb tech for way too long about a display they had. Did you know you can fire a rifle into C4 and it won’t detonate? Or the most time consuming explosive to dispose of is sweaty dynamite? My wife chatted to a hostage negotiator. They had a glider and pilot from the civil aviation patrol and we chatted to him for ages about local gliding conditions and riding thermals into Wyoming and back.
They had a cool karate demo at the end of the day – a full contact style I did briefly some time ago called Ken Po. The acrobatics were matrix-like and the base commander broke a pile of 8 bricks and didn’t even flinch when I shook his hand as we were leaving. Cool guy and he seems to be an inspirational leader.
Thanks to all the volunteers at Buckley for spending your Saturday morning letting us civilians peek behind the curtain.
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Has your WordPress Blog been Hacked? Email me now!
If your WordPress blog has been hacked, please email me. I’m collecting data on intrusion methods and backdoors. If you’ve been hacked, I’ll examine your server free of charge, share what I find with you and will make recommendations on how to repair your site, all at no cost. Please note that I will need “Shell” access to your machine. In other words I’ll need a username and password and will log in via SSH to examine the server that hosts your WordPress blog.
If you’re in dev or ops and have an attack vector you’d like to share, please zip it up and email it to me with as much technical detail as you can.
Email me at mmaunder at gmail.
Thanks!!
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Rescued kitten Stix, 9 months after being found in the gutter with a broken pelvis
My wife, Kerry, went down to California last thanksgiving for a brief trip with her sister Sandy. They were driving along in Fountain Valley with my niece and spotted a kitten lying in the gutter. As they approached her she hauled herself out of the gutter in a badly injured way.
They immediately stopped and tried to get the kitten out from the bush she’d crawled into. The neighbors said she’d been hiding in that bush for at least 2 days. Animal control had been out and couldn’t catch her.
It took the three of them 45 minutes to get her out with my wife crawling under the bush coaxing her the whole time. She eventually caught the little thing and they took her to the Vet ER.
Turns out Stix, as she came to be called, had a broken pelvis. She was 9 weeks old. Three breaks, with the largest one highlighted on the xray below. This xray links to the hi-res full body xray if you’re interested.
Kerry and Sandy had to leave immediately to drive back to Colorado from California and they took Stix with in a cat carrier.Stix was paralyzed from the base of her tail down and Kerry was told the kitten may not be able to use the bathroom properly. On the drive back to Colorado, in a Vegas hotel room the first time Stix peed in the catbox there were cheers. Later that night she pooped, and more cheers. In that hotel room when Kerry cleaned her cat carrier the blanket was covered in dead fleas that had fallen off from the anti-flea medication the vet gave her. She also wolfed down her first meal like she was starving.
Kerry started by saying she’s just going to foster her and find her a good home once she’s recovered. The road to recovery was long. Kerry kept her in a cat carrier initially. As she healed she bought a large pet playpen and kept her in there to limit her movement. She recovered further and eventually got to roam around the house supervised.
Of course attachments grew and she became our cat.
The first time she lifted her paralyzed tail slightly was a big day. A few months later we were watching TV with her and she actually twitched the end of her tail and we were shocked. More cheers.
It’s now 9 months later and she’s the new favorite child of our three pets. We have an australian cattle dog and Stix doesn’t realize she’s a cat. She imitates our cattle dog so much we’ve called her a cattle-cat. When Joey chases the ball, she goes after him. And she follows us around when we take Joey for a walk. That’s in between wrestling with our oversized orange tabby.
This is a video of her at the end of a 20 minute walk in 90 degree heat out here in Colorado. She’s very camera shy so it’s taken me a while just to get this footage. I’ve never known a cat that comes when you call her. She’s awesome and for starting life with a broken pelvis she’s turned into a great hiker and runner which is highly unusual for a cat.
Our cattledog has always been partial to me – they tend to be a one person animal. When Kerry is sitting reading, Stix will jump on her chest and snuggle right under her chin. So she jokes she finally has a pet of her own.
Not all rescues have a happy ending like this and the prognosis for Stix was very bad when Kerry and Sandy rescued her. But I see similar stories online and I think animals are tougher than humans because they don’t know that they’re injured or disabled and so they lack self-pity. As far as Stix is concerned, everyone else’s tail is just a little too active and for some reason in the last few months her back legs got all grasshoppery and now she just wants to run everywhere.
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WordPress Security: Hardening and Malware list removal
I spent some time yesterday reaching out to folks I know to try and get some input on WordPress security, avoiding getting listed as Malware and how to get removed from the Malware list. Rand Fishkin, the founder of SEOMoz and all round SEO God was kind enough to introduce me to Justin Briggs who is an SEO consultant and guru. Justin quickly came back with the following advice:
WordPress is certainly more susceptible to malicious attacks due to its popularity and the large number of sites that can be compromised with an exploit.The best preemptive solution is to keep up on updates and increase security associated with WordPress.Here are two good articles on ways to improve WordPress security.WordPress offers an article on hardening WordPress:http://codex.wordpress.org/Hardening_WordPress And Matt Cutts wrote a few tips on his personal blog:
http://www.mattcutts.com/blog/three-tips-to-protect-your- wordpress-installation/ If a site is compromised, Google will make an effort to get in touch with you. They outlined these details of how they attempt this here:
http://www.google.com/support/webmasters/bin/answer.py? answer=163633#3 They also offer some additional tips:Once a site has been cleaned up, you can send a request to Google:I’ve had a friend’s site who was exploited several months ago. It was a bit of work to get it cleaned up, but the warning was removed relatively quick after submitting the request to Google.I contacted friends who are current and former Google employees but no luck getting in touch with the Malware team. In general it’s hard to connect with folks inside the big G with questions that are usually handled by support teams. [As I’ve been politely told in the past]. 🙂 -
Breaking: Google starts to block hacked WordPress blogs as attack widens
I’ve had two reports in the last 12 hours of WordPress blogs that were compromised via the Timthumb hack being listed as malware by Google. If you try to visit either site, you are confronted with the following:
These sites are listed with the warning that “This site may harm your computer” in Google’s search results and Google blocks access to the site with a warning forcing you to manually type the URL into your location bar if you really do want to visit the site:
One of the site owners sent me the detailed info that Google Webmaster Tools was giving her:
This malicious code is appearing intermittently on this author’s WordPress site. I’ve seen this same pattern recently in blogs I’ve repaired and the way it works is that the site is periodically downloading new PHP code from a remote site run by the attacker and re-injecting it into the wordpress code. That allows the attacker to add, remove and update whatever code he/she is executing on your blog. So they could for example update any spam links every few hours.To prevent your site being listed as malware clean it as fast as possible
The fastest way to do this, although it doesn’t gaurantee a complete clean, is the following:
- Remove all old plugins and themes you aren’t using.
- Upgrade all your plugins and themes to the latest versions and make sure none of them use an old version of Timthumb.
- Clean any Timthumb cache directories.
- Upgrade your entire wordpress installation, even if it’s at the latest version. This overwrites all wordpress files.
- Search your directory tree for any remaining suspicious files that contain base64_decode wrapped in an eval() statement or URL encoded data. More info on how to do this search here. Delete any files you find. NOTE: If you don’t find any additional infected files in this step, it’s highly likely that your site is not clean. Every attack that I’ve seen so far using Timthumb gets in by uploading a file into the cache directory and then uploads an additional file into a writeable directory on the blog to ensure continued access once the cache is cleaned. Make sure you find that additional file.
- Make sure the only directory that is writeable in your wordpress installation is wp-content/. Directories like wp-admin and wp-includes should be read only by the web server.
If you are already listed as malware by Google, here is what to do
Clean your site using the above steps. You can find more suggestions on how to clean your site on this page.The fastest way to get your site removed from Google’s malware list is to request a review through Google Webmaster Tools. You can find the help file on requesting a malware review on this page.The process takes about 24 hours to get your site removed. You can find out more about Google’s Malware list and safe browsing report on this page.Potential long term impact of this vulnerability
The fact that I’ve seen the same domain being used by attackers on multiple blogs suggests this attack may be partially or fully automated. The worst case scenario is that we end up with a WordPress botnet with thousands or tens of thousands of servers on high bandwidth links compromised and able to send spam emails or launch a huge DDoS attack.
Keep in mind that most botnets are compromised windows machines on relatively slow home broadband connections. Their uplink speeds are around 512kbps. These WordPress servers are on links that are a minimum of 10 Megabits per second each, so they have plenty of firepower for a coordinated attack. One WordPress server is equal to at least 20 infected PC’s in terms of pure bandwidth firepower.
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WordPress Security: Please delete old themes and plugins
I was contacted by another site owner who was hacked via vulnerable WordPress themes today. He had updated to the latest non-vulnerable version of his theme, but the WordPress theme installation or update process doesn’t remove, or remind you to remove, old themes that may be vulnerable. So while they encourage you to update everything, old versions are still lurking on your site waiting for an attacker to take advantage of them.
Remember: Delete all old unused themes and plugins.
In this case an attacker once again used an old version of timthumb to install an attack shell called Sniper_SA. The attack shell was Arabic so I’m assuming the attack came from an Arabic country. [The last 3 I’ve seen were english]. This one was base64 encoded inside a PHP eval.
The web host is one of the top 3 WordPress.org hosts on the web. Their default installation is to have your entire WordPress installation writeable by the web server and the server can even write to your home directory under the web root. This opens up all sorts of possibilities for a hacker to gain a remote shell. WordPress hosts, please secure your default WordPress installations so that only directories under wp-content/ are writeable. Also make sure the user’s home directory is not writeable by the web server by default.
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DeployMint: A Staging and Deployment system for WordPress
Exec Summary: Today I’m launching a Beta open source project called DeployMint. I’m using it on WordPress installations where WordPress is being used as a CMS. It runs as a WordPress plugin and allows for staging and deployment of WordPress sites along with robust version control and zero down-time during deployments. It uses the Git version control system to store site snapshots in a safe and space efficient way. It also takes a “belt and braces” approach and provides an emergency back-out system separate to Git in case a deployment fails. You can download the latest version of DeployMint and see a video demo at the DeployMint project page on Google Code.
Full blog entry:
My company is busy moving to using WordPress as a CMS and I wanted a way to instantly deploy several new pages of content or an entire site and have dev and staging sites to test new ideas. I also wanted version control, instant deployment and an emergency back-out system.
I also needed comments to be preserved on the live site so that if I deploy a new version, the existing comments on the live site stay where they should be and only page or post content is updated.
So I created a WordPress plugin called DeployMint.
DeployMint runs under WordPress MU. You create as many subdomains as you would like, for example:
- development.example.com
- staging.example.com
- example.com (your live site)
- Then you design your entire site with themes, pages, content on development.example.com.
- Once you’re done, you take a snapshot of development.example.com and deploy that snapshot to staging.example.com.
- Your client reviews the new site on staging.example.com and suggests changes.
- You make the changes on development.example.com, take a new snapshot and deploy that snapshot to staging.example.com
- Once your client is happy, you take a snapshot of staging.example.com and deploy it to example.com, your live site.
Here is a video showing the basic functionality of DeployMint. DeployMint is installed on this blog and I use it to test out new themes and design changes. It works as well on a blog or when WordPress is being used as a CMS. In this video I take a snapshot of my live site (this blog) and deploy it to my staging site staging.markmaunder.com. Then I make a minor modification, I re-snapshot the staging blog and deploy that snapshot to the live site.
DeployMint is space efficient because it uses Git to store snapshots. It also makes a full copy of your entire WordPress database including all your WordPress MU sites every time you deploy. Because these require more space, you can choose how many of these full backups you want to keep. If things go awry with your database or deployment for some reason, you have an emergency backout system that will restore your WordPress MU installation to the state it was in before your previous deployment.
Behind the scenes, DeployMint (DM) works as follows:
- To install DeployMint you need to create a data directory that is not under your web root, but is writable by your web server.
- When you create a new project, a new Git repository is created.
- When you take a snapshot, DM dumps all tables belonging to the blog you snapshotted into individual files.
- Those files are checked into a ‘Git’ repository. DM uses git for storage because it’s space efficient and robust.
- Every snapshot you create is a new branch in the repository and only the changes are stored.
- When you deploy using DM, it simply checks out the branch you want to deploy and imports it into a temporary database.
- In that temp database, we merge all existing comments on your site into the site we’re about to deploy.
- DM also modifies any hostnames it needs to, to reflect the site we’re about to deploy to’s hostname.
- Before deployment, DM takes a full backup of your entire WordPress MU database including all sites and stores this for emergencies in case you need to back-out your changes.
- These backups take up more disk space than snapshots, so you can choose how many of them you want to keep and DM auto-deletes the oldest ones first.
- Then a rename is done which takes a few hundredths of a second to replace your old database with the new database we’re deploying.
- And you’re live with your new site!
Please post a comment below if you have any features suggestions or comments. Thanks.
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Two techniques to scan your WordPress installation and check if you're hacked.
I just helped another target of the timthumb.php vulnerability to clean their machine. The method the hacker used to hide their tracks was a little different to what I’ve seen in the past. So I wanted to mention it here and let you know how to scan for it.
As I previously mentioned, the method I’ve seen hackers use to hide their source code is to encode it using base64 encoding and then use base64_decode and eval() in PHP to execute the code at runtime.
You can scan for base64 decoding by getting a shell on your WordPress server and running the following in the root of the WordPress installation directory:
grep -r base64_decode *
Keep in mind that some files that are not hacked will show up, like the newest version of timthumb.php which includes a base64 encoded image. But this is a good starting point to get a list of files that warrant further inspection.
The hack I saw today was different. The hacker used hexadecimal escaping to hide their tracks. They didn’t just encode hostnames and things that a security analyst would obviously search for. They also encoded individual javascript commands and strings containing HTML element names.
You can use this perl compatible regular expression to search for hex encoded data in your javascript. Again, run this in a shell in the wordpress root installation directory:
grep -rP “(?:\\\\x[A-F0-9]{2}){5}” *
This will search for strings of at least 5 sequential hex encoded digits. You may get some false positives like class-simplepie.php . But again, this will give you a list of files that require closer inspection.
The file that was infected today was wp-includes/js/l10n.js. The attacker had appended hex encoded javascript to it. You can see what a normal file looks like here.
If you’ve been hacked, or suspect you’ve been hacked, drop me an email at mmaunder at gmail. I charge a very reasonable consulting rate and it usually takes 1 to 3 hours to fix the system and harden up permissions to prevent future attacks.
